1. A good start would be to create a blog on http://tumblr.com
2. Choose a pre-made theme, then save
3. Sign up for affiliate programs such as on Amazon and Ebay
4. Fill out their forms
5. Copy their HTML codes that you will receive
6. Paste these HTML codes into the HTML section of your Tumblr blog, under "Customize"
7. Click Save.
8. On your blog you now may have advertisements of Amazon and ebay products. Each time a user clicks on these banners, you get paid a little. Just remember that you should select which products you want to advertise prior to this.