1. Start a youtube channel with ads
You can use adsense to put ads onto your blog and you learn to use afffiliate marketing to make some serious cash, major youtubers make millions per year.
2. Start a blog
With blogging you can use the same techniques that you can use with Youtube, only this way you can also have exclusive content that users will need to pay for
3. Offer a service
You can find many freelance jobs online and they pay pretty well. All you need to do is seach on google for them
4. Become an Amazon Turk
You review products and give your opinion and it can pay decent. Just google Amazon turk
5. Instagram and other social media
Find a niche and gain followers, you can then sell products and sell shout outs. Shout outs can go for over $100 if you have enough followers, so easy money to be made in social media.