Making commissions on your personal purchases and your friends
If you are an Amazon affiliate, you probably know that you will not make any commissions on your personal purchases. They have very sophisticated tracking software. You might not even get paid on family and friends.
I recently joined the Linkshare network. I signed up as a Walmart.com affiliate. They will pay you 4% on all purchases, even your own. I tested it on a small order and they did pay.