Some of yesterdays papers had a mail in rebate form in the Smart Source insert for Theraflu. (These vary regionally so it wont be in all of them however it was in the LA Times.) If you are lucky enough to have it you can try Theraflu for free! Just buy the Theraflu Warming Relief 24 count caplets, send in your receipt and the mail in rebate form and they will send you a check for the full amount!
It may even be possible to make money on this. Check out the following deal from Rite Aid:
* Buy Theraflu Warming Relief (24ct) caplets - $4.99
Use the $2 off printable coupon found here
Pay $2.99 and receive a $1 +UP Reward
Submit your receipt to get the mail in rebate and use your +UP reward on your next purchase at Rite Aid.