What rewards site do you like best?

I’m looking for a site that has a lot of things to do. Offers, surveys, daily tasks, get referrals, etc that allow you to earn points. You then build up your points until you can order something you want. What I’m looking for the most are sites that offer a LARGE variety of rewards.

So what sites have you found that are like this and offer a large assortment of rewards as well? Would like to hear what you have found in your web travels. Most sites seem to offer a limited selection of rewards which I find rather annoying.