Don't make the common mistake of signing up with the first 10 or so companies and then stopping. While that is a good start, it just doesn't work that way. To be successful with online surveys, you need to sign up with a large number of companies fairly quickly. It's like launching a rocket. It takes a lot of energy to get it going, but not much to keep it going. If you give that rocket just a little bit of fuel and wait to see what happens, it is never going to lift off.