Less is more. Make life easy by
1. sticking with the facts,
2. not overcomplicating, and
3. trusting yourself.
Articles below exemplify this.
But none of that matters. What matters is to live while you can. Be all you can. Do all you can. Mostly, have fun.
But some things are universal. No one enjoys involuntary pain. No one wants to die given a way out (or, in). No one wants to fail at goals. No one wants testicular or ovarian cancer.
Think of anything that you and everyone you know—or almost everyone—wouldn't like or want. These are absolutes, meaning universal agreements. Meaning anything else is meaningless.
Plus, the past is fixed and it leads to the future, so there's only one future if you think about it.
If you mean control of your thoughts, then same answer. Touch a hot stove sometime.
Take parallel worlds. Move A to B. Straight path? No, all possible paths, at once. Then, sum.
Result: It adds up, sumwhat.
But there is no such neat dividing line between rich and poor. Were there one, what would separate the two, namely, amount of ownership and the happiness it affords, becomes indisputably inconsequential at the time of death. All men are created—and destroyed—equal.
It is better to have the basics of food, shelter, clothing, and medicine, and one should try to earn enough money to satisfy the few desires that can be bought with it. But sacrificing one's life for the sake of it is irrational and a complete waste of time. Most people fail to realize this and spend their lives miserable, always looking forward to a happier future that never arrives due to that very fact.
Our best bet is to seize the day. In other words, play.