For a starting point, you could go to remotethumbs, log in and then start setting up your sponsor codes.
Once you log in, on the left menu you will see a link to "My sponsors" click through and you will be presented a list of sponsors that they have galleries for.
Go through and identify any existing sponsors you have and fill in the info needed so that they get your aff code into the links properly.
I would reccomend you have at least 10 sponsors set up. If you don't already belong to 10 programs that they have galleries for then go through and sign up for some more. The 10 sponsors is so that you will have a variety of galleries feeding the site. The more sponsors, the more galleries for the program to choose from