For anyone familiar with Post Secret, you ought have a look at What Do You Want to Do before You Die?
In this book, four men start to accomplish a list of 100 things they want to do before they die. What makes this special, though, is that for every achievement, they help a complete stranger accomplish one item on his or her personal list of things to do before he or she dies. Accompanied by handmade art, this book is both heart-wrenching and heart-warming. Pick it up sometime and have a look for yourself.