A word of caution: Don't rely on the detector.
1. Be observant. Constantly watch your surroundings. Most people who get tickets just didn't SEE the police officer in traffic because they thought their detector was a shield wall.
2. Trust your instinct. If your spidey-senses say 'danger', then slow down for a little while. Even if you're wrong 9 times out of 10, that one time where it's right can save you hundreds of $$.
3. Don't be a jerk. If you switch lanes without signalling and act stupid, then it doesn't take a cop to give you a bad day. No detector yet made can protect you from an irate citizen calling the police from their cell phone and reporting the ******* that just cut across three lanes to set up for a curve in the highway.
4. Be safe. As the person exceeding the set legal parameters of the road, you have a responsibility to control the safety of the situation. Just because you can fit your car between those two cars with an inch to spare and make it doesn't mean that you should do it, especially not if it makes someone else jam on the brakes or otherwise risk losing control of their vehicle. You should be like a ninja. Nobody else on the road should even realize you were there because everything you do has no impact on them.
Just some things I've picked up over time. No speeding tickets in 10 years, and that last one was the only one so far and I got it because I violated rule #1.
