Blogging

Perhaps the simplest yet hardest way of making money online. Reason being, firstly, you need to build up a big audience.

Another reason behind this is because you do indeed need to find ways to dominate in your niche/in what you're talking about. Blogging can be simple, being that you can write about whatever you want, and you're free from all boundaries.

To be successful, it's key to use social marketing here. What I mean is building a Twitter page and a Facebook page. This encourages audience engagement, that they will go back to visiting your blog more often. That's what you're trying to do, remember?

Once it's successful, you've got to find the best publisher ad network out there for you. From Bitvertiser to Google Adsense, there are many out there that can serve to your needs. From in-text link advertising with InfoLinks, to banner advertising with Hostergate, there are many out there that can serve to your advertising needs (to earn you money).