Glad you found us here on the Rewards Board. Lets get you started.
There is no one THE Rewards program. There are many. Rewards programs are sites you can go to where you can earn points that you can redeem for different things-gift certificates, prepaid mastercards, and sometimes cash. There used to be many more programs but right now the ones that most people are doing are mypoints,blink,milesource, disney rewards, searchcactus, and netflip. There are a few more that I'm sure others on the board do.
I'm going to bump up a post that gives a "how to" for these programs. Take a look at the sites and see if they offer any rewards that interest you. Start by doing one or two and once you get the hang of it, try a few more. If you try to do too many from the get-go, it will get very confusing.
If you have any questions, post them. Someone will help you out.