ShareASale.com is a central online affiliate program, where you can register to become an affiliate with all manner of online business, using one central source to keep track of them all, create links, banners etc.

It's free to join and costs nothing, ever. All you need is time and the patience and know-how to copy/paste links and banners on your blog, website, in an email to your mates & colleagues - or on your twitter account.

I have registered with about eight affiliate programs, but thus far have only created a few links on my blog and on twitter for two of them. I started linking about 2-3 months ago and have earned $30+ dollars in that time.

Payment is made via direct transfer to your bank account (like RewardsCentral.com does) and the first payout is when you reach $50.00. I will let you know when that happens.

Blurb.com is an excellent one to sign up as an affiliate with as the programs they offer are simple and pay well, in addition to the 15% one makes from every referred sale.

Approximate cost: $FREE