If you're writing for some one else, you can get paid on a per article or per word basis. If you're making your own, choose a good niche, write well, do some promotion, get constant traffic, and watch the money flow in.
If you're ready you can post your profile in content creation section of this forum to write for blogs. ALL THE BEST!!!
If you have BLOG you can earn money through setting ADSENSE programme in the blog and also add some latest topic in the blog also. So more people come to your blog and your blog will develop step by step....