I believe it’s important that you have a great deal of either knowledge or passion about any topic that you develop into an information product. Knowledge makes it easier to create something valuable. However, if you lack knowledge, but have a great passion to learn about a certain subject, it can be even better. You’ll approach the topic with “new eyes” that allow for a fresh perspective and your enthusiasm will carry you through the learning curve.
Once you know the general topic, start blogging. You don’t necessarily need or even want to know exactly what your product will be, unless you already have an idea you think can’t miss. Even then, blogging allows you to have interaction with your readers that will give you valuable market insight. Comments and questions that you receive will be guideposts, and you can also survey your readers.
The secret to hitting a home run with an information product is to ask your readers what they want.