Best way to promote CPA competitions.

So i've been promoting a couple of CPA "competition" type offers with clix galore, mostly on Gumtree and Newsgroups (spam really), made about $30 bux over two days, has anyone got any other ideas to promote these type of offers, "win a Nokia N95" "win a philips wide screen lcd" etc..

Just looking for some suggestions. Thanks.

DEO