If you could could put your hand on the shoulder of your younger self and tell them one thing what would it be? Also imagine your older self, moments before you die, what advice do you think that older self would have for you?
Don't change a thing.
Also, buy stock in Google, Apple, and Facebook.
Younger -- don't waste time, energy, and money on people who don't put forth equal effort....and buy Apple stock!
Older -- you spent too much time being sad about people being assholes....