How to websites, blogs and newsletters are at the top of the money-making heap.
In and for niche markets: how to swing a golf club; how to stay fit; how to eat real food on a pauper budget.
Want to do your part? What do you know how to do, that you love to do, and can teach others by writing about it (or making audios or videos) online?
Caveat: The number one money-maker in the online how to category: how to make money online. Beware, however. Seth Godin calls these:
“The most obvious trap online: websites that make money by teaching you about making money by using the web.”