Make a product that solves a problem, and then sell that product. Can be something very simple. Eg. something like joining PDF files, sharing photos with your

Make a product that solves a problem, and then sell that product. Can be something very simple. Eg. something like joining PDF files, sharing photos with your family, hosting a caldav server, a shopping list app that syncs between android and iOS users... Then get people to buy your product. Start with selling it to your coworkers or friends and relatives, and anyone else you know who fits the target audience. Spend a lot of time talking to your users and when folks run into issues change your product to avoid them. Try to understand what they really need (not always the same as what they say they need) Iterate on the product for a while, and you should have a profitable product.