As a young man you have the whole world and an entire lifetime in front of you. Now is the time to take advantage. Of all the regrets you may have later in life, wasted time will be the most heartbreaking of them all.
Do not follow the path that has been laid out for you, do not do as everyone else you know. Unless you are average.
During your schooling you have been led to believe that you must follow this order: go to college, get a job to pay back your student loans, get married, consume as much as possible, save for retirement at which point you can live life, and then die having accomplished nothing other than being a good boy and doing what you were told.
Everything you have been sold in high school is a complete lie. If you find this unbelievable just ask anyone in their late twenties to mid-thirties who followed this path and see how happy they truly are. They may lie with their words but their soulless eyes cannot tell a lie.
Looking back on how I used to live my life I see a lot of wasted time that could have been used to build something magnificent. I didn't wake up until after my mid-twenties. If I could go back and slap some sense into my 15 year old self this is what I would advise:
1) Lift Weights
I definitely would have convinced my teenaged self to start hitting the weights with a fury. I look back on all those wasted years and think of how I could be so much stronger if I had started hitting the weights at around 14 or 15 years old.
Lifting gives you a sense of pride and accomplishment that a skinny person or a fat person will never know or understand. As a teen you are in the primetime for developing some serious strength and a great physique. You have all that natural testosterone pulsing through your bodies. The ladies melt for a guy with a great physique too.
2) Play a sport, especially wrestling
I used to laugh at all the “dumb preppy jocks” in my school. What I didn't know is how competitive sports like wrestling or MMA developed strength, courage, discipline, and pride – things that I very sorely lacked until much later and things that are lacking in all the youngsters I see who don't compete, spending all their time on the computer or other useless time-wasters.
3) Don't bother going to college
This may be the hardest pill to swallow but college is a colossal waste of time and money. I could have saved myself endless boredom had I chosen a different path. As it was, I didn't even know other paths existed. I learned absolutely nothing useful in college and what I did learn was downright detrimental and that is because nothing is actually taught in college. You don't go there to learn, you go there to further your indoctrination and emasculate you even more.
Anyone and everyone go to college now and because of this colleges and universities are filled with monumentally stupid people who have no earthly business at an institute of higher learning. As you will learn later a college degree means absolutely nothing when you go your own way and do not follow the path that everyone else will follow. A college degree does not guarantee a “good” job. A “good” job does not guarantee safety. The only safety guaranteed is what you do for yourself. There is no safety relying on other people.
If you must go to college you should go later in life. I hear people say “Oh, I'll travel in a few years when I have time. Oh, I'll start my business in a few years when I have time”. If you must go to college, go after a few years of real education in the real world. If you go, you had better get a technical degree (engineering etc..), something you can't learn on your own. Arts, psychology or anything ending in “studies” degrees are completely useless in the job market. Not that you should want to get a job.
FYI – You do not have to go to college to get drunk, party and hook up. That can be done anywhere at any time.
4) Travel often
I would have told myself to skip college and instead immediately start traveling abroad, backpacking Asia, or Europe, or South America. Get a part time job while in High School and save your money. When you graduate high school you should head abroad for an eye-opening experience you will never forget or regret.
I would have learned more in a year of traveling than I learned in 7 years of college (or 4, or however long it was). Hell, I lived in Texas for 10 years and I never even went to Mexico. I would have slapped that little bastard (me) in the mouth and told him to travel often and everywhere.
5) Turn off the TV
6) Don't work full time
I used to manage a Blockbuster video while going to school full time. What a waste of a young man's life. I would have convinced myself to not work at all and work instead on an entrepreneurial venture. I always had the desire but I never had the courage to just dive right in until several years later. You should be of the mindset of never having a real job or wanting a real job.
The only way you will ever get rich is to build a business yourself. The only way you will have security is to build a business yourself. The only way you will have freedom is to build a business yourself. Do you really want to go 50 years asking permission from a lowly middle management executive for a one week vacation per year?
The only job you should ever have is one that provides you only with the bare necessities and leaves you hungry for more, one that gives you time to pursue other ventures. When you have a full time job that pays you enough to buy all the stupid worthless shit you see on TV you will get lazy and you will NEVER DO ANYTHING WORTHWHILE UNTIL YOU QUIT. Don't fall into that trap. Live as cheaply as you possibly can.
7) Do not go into debt for any reason
Do not acquire school loans, do not use credit cards, do not get auto loans. That's how they entrap young people into debt slavery. “Oh, I can't go travel I'm in school debt up to my eyeballs“. You go into debt for your “education” and then you pay for it the rest of your life. This is a waste of your prime years. If you can't pay cash for it, don't buy it. Debt is slavery.
8) Don't listen to anybody
Advice given to you will be, without question, terrible. It will be the same thing over and over “Go to school, get a good job. You can do all that other stuff later.” You can respond “Oh, really? Is that what you did? Went to school, got a job and then fulfilled your dreams later?” and see the look of regret in their eyes.
People who fell for the joke want you to fall for the same joke, it's a part of human nature for people not to want others to succeed where they failed. Conventional advice is to be ignored, always. You are better off doing the opposite.
As a young man you think you have all the time in the world. You don't. You have only a brief time on this Earth. Use that to your advantage. Never for one second think “I can do all that fun stuff later” because you can't and you won't.
Now is the time. You are in your prime and if you don't take advantage you will waste away like all the people you see who are dead inside. The same people who are waiting for retirement, pretending they are going to go and do the things you will do right now.