You could also opt to use existing websites for making money. These include both active income and passive income methods. For example, you could sell some used items or invest in creating some digital designs that then can be sold on merchandise. Again, devote a sizable portion of your time to passive income so that you can slowly build up earnings that will arrive on autopilot without any extra added effort. 

This is a more technical way to make money online then most of the other strategies given. But you can get an excellent course on how to make it happen with Steve Chou’s Create a Profitable Online Store program. Steve and his wife have built a highly successful online store – selling wedding napkins – and he’s anxious to provide insider secrets to people who sign up for his course..

Drive for Uber or Lyft: If you're in a locale where you can find Uber or Lyft (or even one of the many competitors around the world such as China's Didi), you could easily make a respectable income. The hours are flexible and you can work as you see fit, making it perfect even if you currently have full-time employment but are looking to make some money on the side. 
Set your price. Usually, websites sell for 3-5 times the yearly revenue. So if you had a blog for six months that made $30,000 in those six months, your yearly revenue would be about $60,000. You could then sell your site for $180,000 or more depending on your buyer. Bigger companies are most likely to spend larger amounts of money on a website than small companies are.
Robo-advisors are diversified investment accounts that are automatically managed by a computer algorithm (as opposed to a human money manager). If you want to invest, but don’t have the money, or don’t want to invest with a money manager, robo-advisors are for you! Robo-advisors make investing easier—and cheaper—so they’re perfect for new investors.