The question that I get the most about eHow, other than how much money you can make there, is what eHow writers should write about. The answer is really that there is no one answer. There is no one topic that's any better than any other to write about. Even if you do have a writing niche, it's a good idea to cover several different categories in order to keep your income steady and diversified. Interest may flag in one category during parts of the year, and if you have several categories covered, you may not notice that difference in terms of revenue.
Here's where I come up with ideas: searches, life experience and Niche A Day.
Searches for eHow topics are done through keyword tools. To use them, just come up with something you want to write about any type it into the search box. Unless it's a very obscure topic, you will likely be presented with dozens of phrases related to the topic along with how many people search for each phrase each month. This will give you a lot of ideas about angles to cover in different articles. Instead of doing one overview, the ideas you generate with a keyword tool may give you the ideas for 10 articles that covered different aspects of the topic.
Life experience is just that- what you do in your everyday life. If you're stuck for a topic, just ask yourself what you know how to do. I have a lot of candle making articles on eHow because I know how to do that and can write those articles quickly. You may know how to crochet a blanket, fix kitchen plumbing, grow vegetables, surf, run a retail store, etc. All of these make great how-to articles.
Niche A Day is a free subscriber service that sends you an email every day with a different niche topic and the high PPC bid price. That's the price that advertisers pay for those ads. While the PPC price is useful, what I have found more useful is simply an infusion of new niche ideas every day. While Niche A Day does send some spam along with the daily emails, I have still found it worth it. Quite a few of my eHow articles started from an idea from their daily email. Each day, I look at the email they send and decide whether I could write an article on that topic. If so, I save it to an email file that's just for those emails. Then, anytime I'm stuck for an idea I just look through the file and choose one.