Of course, the simple and correct answer is to obey the letter of the traffic law, but the world isn't always as black and white as the police car pictured. Enter the radar detector. Used in the right fashion, this can simply be a great piece of insurance to avoid minor indiscretions.
Models such as the Valentine V1 and Escort Passport 9500ix are top of the line models that provide a variety of technologies, some of which include laser reading capabilities, gps speed readings, and long distance warning ranges. The Passport 9500ix is virtually immune to false alarms, and with the use of the built-in gps technology, it can warn you when red light and speed cameras are in use.
There are also more common types of radar detectors on the market such as the Cobra XRS series radar detectors that have many of the same technologies in their radar detectors, minus the price. Cobra radar detectors also happen to be a lot less expensive too! These may not give you the best warning response but will get the job done while staying on budget.