JC Penney coupon for $10 off $10
If you want to maximize your savings, buy something on your needs list that is just about $10. This Take Shape torso smoother in tan or black is $12 (orig. $16). Girls' print T-shirts are $10-$12. A two-pack of Jockey men's boxer shorts are $12.75 (orig. $17).
Sign up for eBates and get an automatic cash rebate (last time I check it was 3% for JCPenney) on top of your coupon code. The rebate takes 30-90 days to arrive as a check in the mail.
Caveats: unclear when the code expires.