Most people who make $100 a day aren't going to come out and tell you exactly what to do. But the simplest method is to come up with, or sell a product with at least $100 profit and then try to make one sale a day, like I said, pretty simple.

I used to do it with facebook pages. I would check out local businesses (any city) that could go for a custom facebook page. I had some templates that I could customize really quickly and would throw up a mock page. If I could get through to the decision maker and show them the example, I was about 20% successful in a sale. Considering the costs were just my time, I was easily profiting $100+ a day by making 10-20 calls and emails a day.