Lunch It, Punch It - A personal reward system...

As I've said before, good product design doesn't only apply to products you buy - they can be systems or rules that positively impact your behavior as a "user." And here's one that fits that bill: Lunch It, Punch It cards are printable rewards cards for yourself - that is, punch the card each time you pack a lunch, and then "earn" the reward of going out for lunch (or some other reward you may want). It uses marketing techniques developed by and for business, but for personal improvement: you'll save money, eat healthier, and get more done at work. It's amazing what you can do when you're willing to trick your brain into doing it!

[via Lifehacker]