Guilherme
I started making websites when I was 10 (I am 35 now), when I was 12 I owned a free web host, by 14 I worked doing SEO at a analytics company at 15 I left school. At 16 I was kicked out of my house, at 17 I lived in the Y.M.C.A. (yep the place from the song), at 18 I was a bouncer and had produced a song that was 1# (in its respective genre not a big one) at 21 I read my first book, few months later I had my first real job in marketing, 9 months later I started on my own as a consultant.
Since then I've done consulting for big and small and made a lot of software.