Many people who are new to online marketing get into it because they want to make some money. They don't know what to sell, so they fall into the easy option of selling ebooks and reports; either directly or as an affiliate through ClickBank etc.
While this is not a bad idea - it can bring in a very nice income if done well - but it's not an ideal situation.
Most successful businesses are run by people who are passionate about the product they are selling. Unless you're a good writer, or an experienced marketer, the chances are that your ebook business isn't going to produce a life-changing income.
So think about your interests and hobbies. Even if it is something you dabble with now and again. Could you earn an income from that?
Take photography as an example. It is something which I really enjoy. I'm not a professional by any means, but I believe that I have an eye for composition, and I have taken some good pictures in the past.
So how do I make money from this hobby? If I take a picture that I'm particularly proud of, I post it at RedBubble. This is a site for photographers and artists. You set up an account, upload your images and set a price for them. Anyone visiting RedBubble can buy prints of your work in various formats ranging from cards to framed prints. RedBubble handle all the order fulfillment. All you have to do is provide the images. It also helps if you publicise your "bubble", but you can use any online and offline marketing techniques for that.
RedBubble have base prices for each product, and the artist/photographer simply specifies a markup on those prices, which is typically 20%, but you can set whatever markup you see fit.
RedBubble will protect your images on the website by applying a watermark. This of course does not appear in the printed products.
I like the service that RedBubble provides so much that I now carry a camera with me wherever I go, just in case I see something worth capturing.
So if you're into photography, why not consider selling your pictures at RedBubble.