As participation i would like to nominate this comment by @citizenzero.
Thank you. You've made my day. I've enjoyed my life immensely though some would say I wasted it. Therein lies my first and second recommendation to you.
Your 20's are your true golden years. Don't waste them going to school, starting a family or entering a career. You'll never have those eye-opening experiences backed by boundless energy, a healthy body (and great sex!) again.
Don't concern yourself with the opinions of other people. Most people will waste their lives trying to get rich or famous or popular and will fail miserably. Sure, you might work hard and end up with a great retirement income that lets you visit swank resort hotels that insulate you from the real culture of a country, but you won't have the energy (or desire) to do much more than vegetate. That's the truly wasted life IMHO. Follow your own drummer.