[James Nardell]

If you haven't already done so, go to Commission Junction (or any of the major networks for that matter) and open up an account. You can gauge which programs are profitable by looking at their EPC figures (obviously you need to do some calculations first to work out projected ROI).

I must emphasise that just because a program has a high EPC you're not guaranteed to make money (if only it was that easy) but it shows that it is possible with the right marketing strategy.