Making money online is not a simple task and there is not just one method that people use to make money online. It is actually like a business where you have several methods to make money online, but your first dollar is always the key to success.
As mentioned above, there are several ways to make money online such as affiliate marketing, blogging, selling products, selling services, flipping websites and so on.
You must first find what works for you or in which field you could expertise. That is actually the hardest part and once you have found out what works best for you and made your first dollar, hence forth the process is just to rinse and repeat the same process so the income is multiplied.
Once you stabilize one method of making money online, you then have to move forward to the next method that you think will work best for making money online. This way, you can easily increase your revenue.