I sold my company for over $40 million when I was 31.

Here’s every idea I tried before my big win:

1. In high school I made $2,500 one summer flipping seniors’ used sports gear on eBay.

2. At 20, I launched a hot dog stand called Southern Sam’s: Wieners as Big as a Baby’s Arm. Made up to $1,000 a day. Learned how to sell - and how to blow all my money on beer.

3. That same year, I started an online liquor store selling rare whiskey. It lasted three months before a lawyer told me I wasn't doing things correctly. Still made $10K in profit.

4. In San Francisco, I started a weekly business book club called The Anti-MBA. Couldn't figure out how to monetize it, but met lifelong friends.

...

Over the past 20 years, if you just stayed in the market, you made about 10% a year, which means your money doubles every 7 years.

If you missed the best 10 days, you cut your returns in half to 5%.

Miss the best 20? You basically...