This one has been around for a while......

.............................but bears repeating. 

50 Things Every 18 Year Old (read: every adult) Should Know. 

 Full list is here.  A smattering of samples here:

3)  Compound interest is your friend. Saving even a relatively small percentage of your income each year, starting at 18, can leave you in much better shape by the time you're ready to retire.

12)  Ideally, you should choose something you love to do so much that you'd do it for free and find a way to make it into a career.

26) When men have a problem and they tell you about it, they want to know how to fix it. When women have a problem and they tell you about it, they just want you to listen.

30)  When you're 18, you worry about what everybody is thinking of you; when you're 40, you don't give a darn what anybody thinks of you; when you're 60, you realize nobody's been thinking about you at all.

39) Nobody owes you a living.

40) You are not a victim.

46)  Ironically, successful people tend to fail a lot more than unsuccessful people. They also tend to ask a lot more questions.

48) You beat 50% of the people by just showing up. You beat another 40% by working hard. The last 10% is a dogfight in the free enterprise system.

50) When trying to decide between two closely matched alternatives, always have a bias towards action. In the long run, it'll lead to your having a lot more experience, great stories, and a richer, fuller life.

Thanks Maggies'