Today, he says, his net worth is somewhere north of 100 million dollars. That's not because he's an entrepreneur, though he has started a handful of companies. Jason got rich as an entrepreneur. But he got really, really rich by investing in the crazy ideas … of other entrepreneurs.

He just wrote a book: Angel: How to Invest in Technology Startups. He says he can tell you how he did it, and give you pointers so that – maybe you can do it, too.

In the tech world, we call these people "angel investors." They're usually the first money into a startup, giving six figures or less – just enough to keep an idea going while the founder figures out whether it's big enough to attract millions from venture capitalists.

The downside of being an angel investor: It's really risky. You're probably going to lose the money you put into 90% of startups. The upside: If you get a couple of winners, they can be huge wins.

And get this: because of the way regulations are changing, you can now become an angel investor, from the comfort of your computer. You can pool your money with other angels.