Sixty seven-year-old billionaire and entrepreneur Richard Branson has done a lot of crazy things.
He left school at 16 to start a magazine, tried to circle the globe in a hot air balloon and is now expecting to go to space by April of 2018. His brand, Virgin Group, has 60 businesses, ranging from mobile phones to airlines.
"Your father and I ... opted to give you plenty of scope to learn by your mistakes and so left you to get on with your Christmas tree growing, bird breeding and all the other weird and wonderful enterprises you came up with," Eve Branson writes in a letter to her son "Ricky" that Branson shared on his blog.
But, there was one thing that she stood firm on, and Branson says it taught him a crucial skill for success: how to treat other people.
"The most important skills I had to learn to be successful were people skills," he tells CNBC Make It.
As a kid, his mother emphasized the importance of respecting others. "If I ever said anything ill about somebody as a kid, my mum would send me to the mirror and make me stand there for 10 minutes because she said it reflected so badly on me," Branson says.