Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online.
I loved seeing the example of the Kids Tablet with Wifi utilizing affiliate marketing. It gave me some great ideas on integrating amazon for my own children’s blog. I would be interested in knowing how much they are earning monthly from their affiliation. Being a mother of a two year old myself, I could see myself writing reviews on Amazon products my daughter enjoys.