One of the biggest and most interesting ways to earn your money online, without offering any kind of product, is to make and write your own blog. You can put adverts on the website, promote products of different companies or even get contracts with those and be their ambassador. There is a huge variety of things that you can do, but the most important and interesting one is the creativity that it takes and the fun that it makes to be an online entrepreneur. You can see it almost as a hobby, but still earn quite a lot from it, if you are good enough and know how to use the positive and prevent the negative sides.
How can you start?
The best way for you, and every other up and coming blogger, to learn what it really is about, is to start reading some blogs. You should not only focus on the type of blogs that you would like to write, but rather try to read as different ones as possible, because you might get some inspiration that way. The key thing you need to do, in order to become successful, is to be original and find new ways or topics to talk about.
Do some research online and see whether you could make it with the topic you would want to write about, because there might be too many of those. Researching and exploring the market is really the main and most important thing you should do. Besides that, you could hire an expert to do some true in depth research and give you a comprehensive analysis of the market and what is needed. After launching, you should listen to your audience and readers, but stay true to your hearth, because if you do something wrong or change for worse, you will be the one paying the price for doing it.