I registered with Triond Publishers and submitted several articles a day on a variety of topics. If your submissions are approved for publication they are placed in the relevant e-magazine. I placed Triond wigets on Facebook, Twitter, Igoogle to advertise my articles. I also invited my friends through MSN. Payment for your articles are based on the number of views you get on each article. It takes awhile to build up a following and the income that goes with it. I am still working on it. Hope this helps.
p.s. check out Stumble which is a search engine based on your areas of interest. This helps you to come up with new ideas to write about.