I wrote this post after I quit my job in investment banking and moved over to a dotcom tech company. I realized that so many of us define success as "having" things (money, cars, houses), whereas the things that really contribute to happiness are experiences you have (friends, trips, etc).
The goal of this exercise is to create a list of 30 experiences to "have" by the time you're 30 years old - before you're tied down with family, career, and mortgage. You can use my list as a model, or write your own. Now, go out there and do them - don't waste another day.