A great way to make money is to write for other people trying to get their sites picked up by google. If you take some time to pick their brains while you ghost write for them maybe you will learn a thing or two about google seo as well as internet marketing. If nothing more look at the sites they are asking you to write for and how they tell you to write your articles.
There's a lot of information in the instructions for ghost writers and it's definately worth the time to think about why writers write the way they do online.
For instance, you should break up your keywords into a main key phrase of 2-5 words and several supporting phrases of 1-3 words. The main phrase should be present once in every paragraph atleast but no more than three times. The secondary key words should appear about 2-3 times total in any one paragraph.
The reasoning behind this is to keep your google SEO high but avoid getting labeled as a spammer by google robots.
Go find some ghost writing oppurtunities and see what you can learn from the experience. Have to walk before you run!