Create a website and build an email list. Publish regularly valuable content to your subscribers. You have to establish good relationship with your subscribers. Do not always present your self as a sales person. Make them feel that you really care about them. Once they trust you and look up for you as a problem solver, there's a bigger chance that they will buy whatever the products you are marketing. If you don't know how to do it, try watching from the youtube. Or find a mentor that can guide you to be come a successful marketer.