Olivia Munn has this one rule when it comes to her Instagram account (Exclusive)

Olivia Munn has learned a lot since becoming a public figure. Whether it's how best to spend her time on planes during her constant traveling, what to do with all the free stuff she gets sent or how to approach posting content to Instagram, where she has racked up over 2 million followers, the actress has it all figured out.

During a recent sit-down with AOL's Gibson Johns at American Express' Luxury House by #spgamex event in New York City, Munn revealed some of the key things she's learned about being a celebrity, including the approach that she's taken to her Instagram in recent years.

"I don’t post in real time," she revealed to us. "So, if I’m somewhere, I’m not really there [when I post a photo]. Even with my girlfriends, I’ll ask them to post later. It’s hard, though, because my best friends aren’t in the business, and they don’t want to have to worry about that. But they get it. A lot of it is just for security reasons. But it’s hard, because you’re recording stories and saving them and then it becomes a homework thing."

The former "Newsroom" star said that "there are a lot of [famous] people that post in real time," but she chooses not to. Another thing that may surprise fans of the star when it comes to her Instagram activity is the fact that, just like the rest of us, she occasionally falls for one of those pervasive Instagram ads and buys something directly off of the social media platform -- even though the products often leave her disappointed.

"Every now and then I’ll buy stuff off of an Instagram ad," she said, shaking her head. "Like, 'You really got me with it!' And it’s usually crap."

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Olivia Munn out and about
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Olivia Munn out and about
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BEVERLY HILLS, CA - OCTOBER 14: Olivia Munn attends the #girlhero Award Luncheon at SLS Hotel on October 14, 2018 in Beverly Hills, California. (Photo by Alberto E. Rodriguez/Getty Images)
BURBANK, CA - OCTOBER 13: Actress Olivia Munn arrives at FCancer's 1st Annual Barbara Berlanti Heroes Gala at Warner Bros. Studios on October 13, 2018 in Burbank, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - OCTOBER 01: Olivia Munn is seen on October 01, 2018 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
LOS ANGELES - SEPTEMBER 13: The Late Late Show with James Corden airing Thursday, September 13, 2018, with guests Mel B, Olivia Munn, Dr. Phil, and musical guest Good Charlotte. (Photo by Terence Patrick/CBS via Getty Images)
HOLLYWOOD, CA - SEPTEMBER 12: Actress Olivia Munn attends the screening of 20th Century Fox's 'The Predator' at the Egyptian Theatre on September 12, 2018 in Hollywood, California. (Photo by Paul Archuleta/FilmMagic)
TORONTO, ON - SEPTEMBER 08: Olivia Munn attends the Creative Coalition 2018 Spotlight Initiative Gala Awards Dinner at House of Aurora on September 8, 2018 in Toronto, Canada. (Photo by Rodin Eckenroth/Getty Images)
TORONTO, ON - SEPTEMBER 06: Olivia Munn arrives to the premiere of 'The Predator' during the 2018 Toronto International Film Festival held on September 6, 2018 in Toronto, Canada. (Photo by Michael Tran/FilmMagic)
TORONTO, ON - SEPTEMBER 08: Jacob Tremblay (L) and Olivia Munn of 'Predator' attend The IMDb Studio presented By Land Rover At The 2018 Toronto International Film Festival at Bisha Hotel & Residences on September 8, 2018 in Toronto, Canada. (Photo by Rich Polk/Getty Images for IMDb)
MADRID, SPAIN - SEPTEMBER 04: Actress Olivia Munn attends the 'Predator' photocall at Villamagna Hotel on September 4, 2018 in Madrid, Spain. (Photo by Pablo Cuadra/WireImage)
MADRID, SPAIN - SEPTEMBER 04: Actress Olivia Munn attends the 'Predator' photocall at Villamagna Hotel on September 4, 2018 in Madrid, Spain. (Photo by Pablo Cuadra/WireImage)
NEW YORK, NY - AUGUST 21: Olivia Munn attends Jennifer Lopez's MTV VMA's Vanguard Award Celebration at Beauty & Essex on August 21, 2018 in New York City. (Photo by Andrew Toth/Getty Images for TAO Group)
NEW YORK, NY - AUGUST 20: Olivia Munn attends the 2018 MTV Video Music Awards at Radio City Music Hall on August 20, 2018 in New York City. (Photo by Axelle/Bauer-Griffin/FilmMagic)
SAN DIEGO, CA - JULY 19: Olivia Munn poses during the 20th Century Fox's 'The Predator' panel during Comic-Con International 2018 at San Diego Convention Center on July 19, 2018 in San Diego, California. (Photo by Albert L. Ortega/Getty Images)
LONDON, ENGLAND - JULY 12: Olivia Munn attends day ten of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 12, 2018 in London, England. (Photo by Karwai Tang/WireImage )
LOS ANGELES, CA - JUNE 18: Olivia Munn is seen at LAX on June 18, 2018 in Los Angeles, California. (Photo by BG023/Bauer-Griffin/GC Images)
SANTA MONICA, CA - JUNE 16: TV personality Kim Kardashian (L) and actor Olivia Munn pose for a selfie photo during the 2018 MTV Movie And TV Awards at Barker Hangar on June 16, 2018 in Santa Monica, California. (Photo by Chris Polk/VMN18/Getty Images for MTV)
SANTA MONICA, CA - JUNE 16: Olivia Munn attends the 2018 MTV Movie And TV Awards at Barker Hangar on June 16, 2018 in Santa Monica, California. (Photo by Steve Granitz/WireImage)
NEW YORK, NY - MAY 23: Actress Olivia Munn visits the SiriusXM Studios on May 23, 2018 in New York City. (Photo by Cindy Ord/Getty Images)
NEW YORK, NY - MAY 21: Olivia Munn is seen in Tribeca on May 21, 2018 in New York City. (Photo by TheStewartofNY/GC Images)
NEW YORK, NY - MAY 07: Olivia Munn is seen leaving the 2018 Met Gala at The Mark Hotel on May 07, 2018 in New York City. (Photo by MediaPunch/Bauer-Griffin/GC Images)
NEW YORK, NY - MAY 07: Olivia Munn attends the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Sean Zanni/Patrick McMullan via Getty Images)
AMERICA'S GOT TALENT -- 'Judge Cuts 2' Episode 1308 -- Pictured: Olivia Munn -- (Photo by: Vivian Zink/NBC/NBCU Photo Bank via Getty Images)
BEVERLY HILLS, CA - APRIL 16: Olivia Munn attends Eva Longoria's Hollywood Star Ceremony Post-Luncheon on April 16, 2018 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic)
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As for all of that free stuff that you often see celebrities posting about on social media? It's just as over-the-top as it seems, Munn told us, still in awe of the fact that she'll get sent, say, an Armani purse or a shipment of La Mer products out of the blue. Though she tries most of it out herself, it would be impossible to keep it all. Plus, she has a big family and a ton of girlfriends not in Hollywood who gladly take some of the products off of her hands.

"I have a really big extended family and a lot of girlfriends who aren’t in this business -- I’ve known a lot of them since college and stuff -- so I pay it forward to them first," Munn said. "Anything that they don’t want -- there’s literally never anything that they don’t want, actually. A lot of the times if I’ve worn something, too, I can pass it on. It’s so nice that people are sending me stuff, and I’ll try to wear and keep it, but I have days when I have my friends come over and we just go through everything."

Literally, the actress, who attended the University of Oklahoma, will have her friends over to watch "Real Housewives," listen to "90s hip-hop or country music," order Thai and "go through all the stuff that people have sent."

"It's like an unboxing," she laughed.

It's that time with her best girlfriends that Munn seems to value most. We were chatting at the Luxury House event, which celebrated the Starwood Preferred Guest American Express Luxury Card, and she explained to us that taking trips with those closest to her is what she considers to be one of life's greatest luxuries.

"Honestly, the most luxurious thing to me is being on a beach with warm ocean water -- somewhere in the Caribbean -- with all my friends and unlimited food," she said. "I [recently] took a girls’ trip that was so fun to Turks and Caicos. I was like, 'This is just the best vacation. We’re all hanging out and taking pictures.' Nobody was telling us to get off of our phones, and it was just such a girl vacation. It was so fun. There was no schedule and no pressure."

And you better believe that Munn has mastered the art of traveling, too. The star said that the jet leg between the West Coast and East Coast is "hard," so she always makes sure her hotel room has blackout curtains that help her get her sleeping back on track. Longer flights, though, provide the perfect opportunity to catch up on much-needed sleep before she gets to her destination.

"I remember when I first started working a lot more, I’d be so excited to be in first class, where they feed you whatever you want and you could watch every single movie and I would just be so tired when I got off," she said. "At some point I was like, ‘Oh wait, the biggest luxury of flying first class is being able to sleep.’ That’s a big thing to be able to do that."

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