Products are everywhere. You can check in the TV, radio or the internet. Take note of what are the programs are being aired regularly. See what are the things that they offer to the viewers. You have travel show, cooking show, kids show, talk show and sports and etc. Lots of people are tuning in to watch otherwise there will be no show.

Those show are aired because the audience wanted to be entertained or informed. These are the just telling you what are people most looking for and also very broad terms.

So you need to find your niche markets to focus on so that you are able to sell to a niche market and will cost you less to do compared to a wide market.

By looking at the shows you might be able to grasp some products idea. For example, if there is a cooking show regarding to japanese cuisine you can actually collect a series of japanese recipes in to an ebook and start selling.

Besides that you can check out in the bookstore. Books and magazines might be able to tell you what do readers like to see.  Look at the titles being written and you might get an idea of what people mostly looking for.

Check on the newspaper coloumn. Look at the specif coloumn topic that a appeal to a reader. Advertisement that run again and again also might able to give you a clue because what are the products that people willing to seek in a market.