What you do is start looking around the sites and deciding what you want while you are still earning the points. You don't always have the option of webcertificates so you may have to get something else. I'm not even getting webcertificates this time because I know I won't get enough to make a difference. This is what I am getting:
Milesource you can get a supercertificate, cash that in for a rain forest cafe gift certificate.
Disney Awards= disney dollars, these can be used for park passes, or anything else in WDW
Creation rewards= disney dollars also
Mypoints= either rain forest or burger king.