You turn 40. Everyone knows that the twenty's are going to be the golden years. The years where they have fun and go on trips to different countries. The thirties, the years where its time to settle down or go up higher in you career. Your forties is the time you become middle aged and have probably already started a family. Think of something that you want to do before you turn 40 that you will never do if you were older than it. It can be as many things as you want.