If you want to be the best at something, billionaire Bill Gates suggests thinking back to whatever you obsessed over as a teenager.
"The thing you do obsessively between age 13 and 18, that's the thing you have the most chance of being world-class at," Gates told Charlie Rose in a 2016 television interview. It's a tip that Gates also shared with Harvard students in a Q&A last year.
Of course, in Gates' case, the activity he obsessed over as a teenager growing up in Seattle was writing software — and that hobby worked out pretty well. Gates went on to co-found Microsoft and become a millionaire in his 20s. He's is now a billionaire the second-wealthiest person in the world.
"I only have one thing that I did obsessively from 13 to 18," Gates told Rose. "And, that is write — [or] try to write — good software."