Traffic stop and driver conduct-- how should you behave?

Question for LEO's all the people that carry. If you're pulled over by a LEO how should one behave? I've read a couple of suggestions but I'm wondering what the glock pro'ers think. Here's what I've heard/read:

-- Roll down all windows
-- Interior lights on if it's at night.
-- Hands stay on the steering wheel until asked for license/registration.
-- I realize it'll vary from state to state whether or not you're legally obligated to declare if you have a loaded firearm in the car. For me, when I'm asked by the LEO I would hand them my drivers license as well as my CCW license, then answer all questions he/she has while I keep my hands visible and on the wheel.

Does this seem reasonable so far?

Thanks in advance