Radar How do you beat it?

When i drive long distances i like to get there fast so i go above the speed limit, oviously there is always the risk of the cop not driving around with his radar on,(very few do this during the day). so what do you prefer a radar decrot or a radar jammer/blocker or what every they are called.

Can anyone please put in your $0.02 it woule be greatly appriciated. Thanks in Advance