Question: 20 years old should know?
Answer: 1) 'Who your friends are' matters. This is the most important thing. ...  2) You're never too young. I can't stress this enough. ...  3) Find your edge. I think it's really valuable for you to find your edge. ...  4) Have goals. ...  5) Stay fit. ...  6) Time & speed. ...  7) Get enough sleep. ...  8) You don't need anyone's approval.