There are so many ways of making money online, it all comes down to what interest you have and at what scale. Is it a little extra side income or is it a full blown business concept.
For extra side incomes and whatnot, I would take a look at some of the "beermoney" forums online and also on Reddit. They have many suggestions for online programs for making money, it won't make you rich, but it will make for some extra side money.
If it is a full time commitment business of any kind, I suggest starting something you actually like doing, otherwise it will become tiresome very fast no matter what it is. And considering there are communities for pretty much anything online, I am quite certain you can sell just about anything you may be interested in.