Walgreens: Buy Frixion pens, make $4.

This one is a little elaborate, but if you like Frixion erasable pens (my editing classmates really loved them for hard-copy markup), here's a way to not only get them free, but get paid $4 to buy them.

• Buy 3 packages of Pilot FriXion pens at $1.19 each. Use $1/1 coupon found in Walgreen’s April Coupon Book (found near store entrance).
• Pay around $.60 out of pocket.
• Send in the rebate found on the pen packages. It says you’ll get a $4.50 rebate.
• Make $3.90!

Rebates aren't exactly instant gratification, but if you have the patience to fill them out thoroughly and wait for the check, it's fun to get free money in the mail. This one seems like a good deal, although I hear the pens have been flying off the shelves, so you may have to hit a Walgreens or two in order to find them.

(Thanks, HeyItsFree!)