Sell yourself and stop selling in general. Once you have sold yourself you can make recommendations, and you will find that money comes easier.
I am selling a few ebooks about PHP programming, weight loss and how to get rich on clickbank and ebay. Makes me 10$ per day.
writing your own ebook on how to make money i could propbably make one about small profits but dont really have time to bother
an ordinary e-book won't sell. You have to show in this e-book how things work. Something that has already been proven by practice. Tell about the experience, the benefits and how it can make people's lives easier. If you manage to that you will have a bestseller I guess.
Research the most popular selling ebooks and then sell your own. But - research the subject thoroughly.
What is good to sell? If everybody would know the answer to this question we would all be rich people.
people like to buy ebook about how to make money from internet or how to make money without any effort maybe you should try those