I wish I learned earlier that it's possible to not want what everyone else wants, in my situation, money. Growing up poor, my mom was always money, money, money. Have to get good grades to get a good job to make money. I joined a business fraternity in college, then a startup incubator, then became an Amazon seller so I have consistently been surrounded by people who really want to make a lot of money.
I had my first loss of a loved one last year and I learned the hard way that money is trivial in the large scheme of things when you have enough. That it is okay to not want to make huge sums of money and to focus on other things in your life that are more meaningful to you like your relationships. But more importantly to be aware of who you surround yourself with.
Luckily I'm 25 so maybe it's good I learned this now but I would give anything to spend more time with the person I lost instead of stressing so hard about making more money. That and in the larger scheme of things, most of the things you find stressful are trivial when it comes to the big picture, death. I watched a wonderful talk by Alexis Ohanian about "Zero Lives Remaining" and it's true. Compared to that, a lot of the things that you thought were the end of the world, really aren't, so take it easy and enjoy life.