I decorated 4 small pieces of paper and wrote "Free Pass" on each. I use these for a few treat cheats each week. Basically, they are for my cravings throughout the week. I don't let myself feel guilty as long as I use a free pass. I keep one in my wallet and three at home.
Things I have used these for: a handful of potato chips, 3 hershey's kisses, a handful of m&m's or other small candy, a can of pop/soda, a serving of regular ranch instead of light or non-fat, a cookie or brownie, etc. I use them for small things, not like a while Big Mac or something!