You can get $10 off a purchase of $10 or more at JC Penney with coupon code Ten4You. You still have to pay for shipping, however. Standard shipping is $6 but if you pick it up in the store shipping is lowered to $4.50.

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.