As a young man, Warren Buffett estimated he could save $300,000 over his lifetime by adjusting his haircut schedule.
Americans looking for ways to contribute to retirement funds can similarly look to their daily purchases — such as their morning cup of coffee — for potential savings, according to a Vanguard Blog for Advisors post by Frank Kinniry.
"By pocketing the $3.50 for coffee each day and investing it instead in a low-cost, diversified Roth IRA, you'd have an estimated $106,000 after 30 years," writes Kinniry. "I don't think anyone would pay $106,000 for coffee!"
Vanguard Blog for Advisors
This type of incremental savings plan is also endorsed by David Bach, author of "Smart Couples Finish Rich."
"Becoming rich is nothing more than a matter of committing and sticking to a systematic savings and investment plan," he writes. "You don't need to have money to make money. You just need to make the right decisions — and act on them."
RELATED: 31 clever money hacks that can make you richer:
31 easy money hacks to help you get richer every single day this month
31 easy money hacks to help you get richer every single day this month
1. List at least one item you aren't using on Craigslist or eBay.
Not only will this help you clear out clutter, but it will turn an unwanted item into cash. If you get inspired and want to sell more, check out this Lifehacker guide to turning unwanted junk into cash.
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2. Pack your lunch instead of buying it.
Time calculated how much someone in New York could save by bringing a brown bag lunch ($3) versus buying lunch ($15). At that rate of savings, if you packed lunch instead of buying it every day for a decade, you'd save $31,200. Calculate how much you would save using this Bankrate tool.
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3. Change out at least one incandescent bulb to a CFL.
According to Consumer Reports: "By replacing a 60-watt incandescent bulb — the most common household bulb — with a spiral-type 13-watt CFL that produces an equivalent amount of light, you could save more than $57 over the life of the CFL."
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4. Program your thermostat to turn off while you are at work or sleeping.
According to Energy.gov, "You can save as much as 10% a year on heating and cooling by simply turning your thermostat back 7°-10°F for 8 hours a day from its normal setting."
5. Delete your stored credit cards from online accounts.
Have your credit card stored to make one-click purchases? If you instead have to manually enter your card each time, you make buying online more of a hassle, which will limit impulse purchases.
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6. Eat meatless.
Many people have adopted Meatless Mondays to help save money and the planet. Start this Monday and see if you can make it a habit.
7. Buy a re-usable water bottle.
Consumer Reports calculates that bottled water costs $346 a year, while tap water costs just $0.48. If you are using bottled water, stop now and start refilling a water bottle instead.
A Planet Money report found that half of all members of one popular gym never go — and theWashington Post reports the gym industry actually relies on members paying for, but never using, the service. Don't let money be auto-debited monthly for anything you don't actively use. Call now to cancel, and read Mic's guide to getting fit for free.
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11. Make sure you are using the right bank.
Check out what unnecessary fees you pay for ATM use and for maintaining a monthly account. If you're paying anything, it may be time to switch to a different bank: Check out Mic's guide to some of the best banks to use in 2016 to 2017 and see how your bank compares. If your bank falls short, make the switch.
12. Open an IRA, if you don't already have one. If you do, check on your investment mix.
An IRA is one of the best ways to save for retirement because you can potentially get tax breaks for investing in it. Check out this 5-minute guide to retirement savings to find out more and follow this simple step-by-step primer on opening one. If you already have an IRA, use an asset allocation calculator to see if you have the right mix of investments.
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13. Create (or review) your budget.
Read up on the basics of how to budget so you can determine the steps you need to take to get a handle on where your money is going. You can also use recommended budgeting apps to make the process easier.
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14. Make sure you are using the right credit card.
Figuring out the best credit card for you is a matter of looking at your usage and needs. If you carry a balance, it's time to shop for a low APR card with a 0% balance transfer. But if you are a responsible card user, aim for a card with big cash-back perks or rewards.
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15. Clean out the air filters in your car.
Pro Car Mechanics explains: "The benefits of a clean air filter are almost immediate. Airflow goes back to the proper level to mix with the gasoline. It has been estimated that replacing the dirty air filter will increase MPG on the car up to 10% and also generate a fuel savings of close $.15 per gallon at the fuel pump." Cars Direct explains how you can clean out your car's air filter.
16. Review your debts and make sure your repayment approach is optimized.
If you owe money on credit cards or loans, review the interest rates, terms and repayment strategy. If you have high interest debt, refinancing could make sense.Think through your debt repayment strategy and evaluate whether you can or should make extra payments.
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17. Call your cell phone and cable companies.
Go over your monthly plans to find out if you are paying for services you don't need. Ask for any discounts that could potentially help you to spend less. Check out these tips for saving money on cable TV.
Learn to let out pants, tailor your own skirts, change the oil in your car or fix a stopped up sink. Wisebread has a list of 10 life skills to learn to save money.
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20. Call your insurance agent.
If you have car insurance, homeowner's insurance or renter's insurance, you may be able to lower your deductible, bundle your policies or get rid of coverage you no longer need. Investopedia lists 6 ways to save on insurance.
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21. Print, cut, or buy coupons.
Using coupons can help you save on groceries, dining out and other items you buy. Browse sites like RetailMeNot for printable coupons or use TheCouponClippers to purchase cut coupons from the newspaper. Focus on items you are going to buy anyway. You might also visit websites like DealSeekingMom to find out how to get items like toothpaste and toilet paper for free — or close to free.
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22. Unsubscribe from daily deal sites or online websites.
If you are subscribed to a bunch of sites that alert you to sales and bargains, you are more likely to spend on items you don't need. Buy stuff when you decide you need it, not when an online newsletter tells you the item is on sale.
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23. Go for a walk instead of watching TV.
You won't waste the electricity on running the TV — and you won't see ads shilling for products. Plus, walking is a healthy and free way to get exercise.
24. Plan a weekend of free events.
Make a commitment to not spend any money this weekend. Look for free community events to attend — or invite your friends over for a potluck or clothing swap party.
25. Plan your meals for the week.
Meal planning allows you to avoid wasting food since you can make a grocery list and buy only what you need. Lifehacker has a simple guide to meal planning and you can check out Mic's tips for healthy eating on a budget.
26. Cook and store food strategically.
Following your meal plan, make up a few meals you'll eat over the course of the week. You can even make some extra to freeze for when you're in a rush and don't have time to cook or pack a lunch a few days later: Just portion out food in little freezer bags so it'll be easy to thaw individual meals.
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27. Have a no-spend day today.
Make a commitment not to spend even $1 on anything for one whole day. Prep your coffee at home, bring your lunch, bike to work, and eat one of your pre-planned, home-cooked meals for dinner.
28. Automate all of your bill paying ... and saving.
If you are still manually paying your bills each month, set up automation for any accounts you can. This helps you avoid late fees if you get busy or forget. If you have a savings account, set up an automated transfer of at least a few dollars per month so you can make sure you are saving something.
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29. Find a cheaper way to commute today.
If you normally Uber, try taking public transportation. If you normally take public transportation, walk or bike to work. If you drive, see if you can arrange a carpool or switch to the bus. Your commute can cost you thousands over your working life.
30. Call HR and ask about workplace benefits.
You should definitely be investing in a 401(k) if your employer offers one. However, you may be eligible for other benefits like corporate discounts on cell phone service or hotel rooms. Find out what benefits are available that you can use to save — you might be surprised (see: "cash in lieu").
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31. Carry around healthy snacks bought in bulk.
It's not just meals that are a money suck, and hitting the vending machine can add up. Buy some dried fruit, granola bars or trail mix in bulk — and then bag it up into snack-sized portions to help your wallet and your waistline.
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Bach estimates the amount of daily savings needed to reach $1 million by age 65 in the the chart below. While it makes certain assumptions about how those savings will grow through investment — such as a 12% annual return rate — it illustrates the impact even a modest savings plan can have in the long run.
But Americans, particularly millennials, have struggled to meet recommended savings goals. Kinniry notes that while Vanguard recommends saving enough so that retirees can spend 75% their annual income from when they were working, the median account balance among Vanguard retirement plan investors fell by 11% from 2014 to 2015.
But that trend is not irreversible, especially for younger investors.
"The best way to change that trend is to continue to encourage your clients to look at their spending through a compounding lens and to calculate how much their regular purchases would equate to over time," writes Kinniry. "Time is the biggest advantage young investors have."