Have you ever read an eReport thinking you were going to find a solution to a problem only to be extremely disappointed with the lack of depth in content?
Sadly, there are plenty of people trying to make a quick buck by writing sloppy information products on a topic they think will make money rather than something they have a passion for.
If you plan to develop information products you will be well served (as will your readers) to write based on your area of expertise. A much higher quality of information will unfold based on your expertise.
Answer the following questions to determine what to write on. What successes have you had that you have the "right" to teach people about?
What are you good at? What do others come to you for advice about? What topics do you know inside out?
One thing to keep in mind; you have to write subject matter that potential buyers will be interested in. There's no reason to create a report that no one is going to buy. That is why doing your research before you begin writing is so essential.
The beauty of information products is that people rarely buy just one information product on a particular subject. Think about your own buying habits. When you have an interest in something don't you get as much information as you possibly can on the topic?
When I was researching healthy eating I not only bought books from my local book store, I bought several reports online within a very short period of time. I wanted as much information as I could get my hands on.
Whether it's animal care, health, midlife, child rearing, or gardening, most people will buy several resources. Your job is to identify the market, what keeps them awake at night and provide a solution by way of a report.