There's an upcoming free sample event by Valspar Paint that you won't want to miss. From Wednesday 1/23 (12 PM Noon Eastern time) through 1/30 (til 11:59 PM Eastern time), they'll be giving out up to 150,000 free paint sample coupons. You'll need to be a fan, so pre-like them if you haven't already. This is a while supplies last event and I expect their Facebook page to be slammed on the first day. However, the nice thing is they are giving away over 100,000 samples, so chances are if you work you will be able to log in later in the day to get one.
The coupon you claim will be good for one-eight ounce sample of Valspar paint at Lowe's.