Yahoo Answers

Yahoo Answers can be a really easy place to find referrals. If you are a blogger, you'll probably have realised that the links created are "nofollow" and therefore not great for link building, however, the amount of traffic often generated is still worthwhile. All you need to do is find a question relevant to the subject you are trying to promote. So if I was trying to promote points2shop, for example, I'd look for something related to Xbox live points. Answer their question sensibly and then leave a sentence to let them know about your site.

The great thing is that Yahoo Answers rank really high in google, so the page will see a lot of traffic. The more people that read your reply, the better your chances are of finding some referrals. I'd advise using a link masker so that your referral link is not so obvious. TinyURL.com is nice because it allows you to personalise the final link.

Answer as many questions as you like for maximum link exposure.