We get old too fast and smart too slowly. If I could talk to my eighteen-year-old self, I would have plenty to say. Some of it would probably be ignored, because eighteen-year-old me was quite capable of being a knucklehead.
The most useful point would be about habits. What you repeat while you are young doesn't always stay a temporary phase. It can become the normal way you approach work, people and discomfort. Then changing it later takes more effort than you expected.
This episode introduces ten pieces of advice. The public recording covers the first five; the rest belonged to the longer version. Those five already give you plenty to examine.
Learn to question the answer
A title, grey hair or a position of authority doesn't make somebody right about every part of your future. Ask why the advice makes sense. What assumptions does it depend on? Does the person understand the result you want?
This applies to me as well. You should understand an argument, not accept it because you like the man saying it. Otherwise you have simply changed which authority does your thinking.
Break a problem into its parts. If you are deciding what to study, ask what skills it teaches, what opportunities it opens and what it costs you in time and money. Prestige alone isn't an answer. Nor is disagreeing with everybody just to prove you are independent.
Different thinking only helps when it is better thinking.
Be careful what becomes normal
I would tell my younger self to take drinking, drugs and cigarettes more seriously. I am not speaking as somebody who always behaved perfectly. Part of the reason I care is that I know how easily repeated behaviour becomes familiar and then hard to change.
The social habit matters too. If you decide you can only talk to women after drinking, you have tied a useful skill to a crutch. If every night out follows the same expensive, destructive pattern, calling it youth doesn't make the consequences vanish.
Build ordinary habits that keep you in good physical condition. Move regularly, eat sensibly and keep the routine workable. You don't need to turn every part of your life into a professional sporting campaign. You need a body that supports the life you want to live.
Get used to doing the work
Effort compounds through what it teaches you. Start projects, finish tasks and learn how to persist when the exciting beginning is over. Waiting until you feel older and more serious can become a habit of its own.
That doesn't mean copying an extreme working schedule. It means taking your chosen work seriously enough to give it consistent attention and enough recovery to continue it.
Finally, notice who encourages useful effort and who repeatedly pulls you away from it. The people around you influence what feels normal. Some will challenge you constructively. Others dismiss every ambition and then offer you another excuse to do nothing.
You don't need to turn that observation into a war with your family or friends. Be deliberate about whose advice you follow and how you spend your time.
Choose one habit you would be unhappy to carry into the next decade. Change the next repetition of it. Your future character is being rehearsed in the ordinary things you do today.
