You can make a lot of money by writing content for online article sites.
I’m going to describe the various sites that offer payment for your articles.
One of the major sites is associatedcontent.com, you can get paid either upfront or for your articles performance based on the clicks it receives from user searches. They offer a decent pay and there is no minimum payment for getting paid.
They pay between 4 and 20 dollars for an article.
One of the other major sites is Suite101.com, though they go through your profile before selecting you, they offer quality work.
Their pay scale is lower than associated content but it is a good option to get your feet wet.
Another major site is Helium, they have a great user interface and its easy to start getting work on their site. The pay is average, but the quality of work is pretty good.
Give the sites a trial and see what suits you.