seeing if you can up your score over 800 "for fun" is wrong on so many levels.
If you are looking for expert credit advise go to the credit forums not a loyalty point forum. Credit is a broad and complicated topic, learning about it can be helpful, but far from "fun". In your case it sounds like it isn't even necessary. You should use your 800 credit score to get a few more credit cards and take a "fun" vacation with the points.