Christian,
What I've done in the past is, if it's dark and am stopped, I have my driver window all the way down, both hands either at the nine and ten o'clock position on steering wheel or hanging outside and have the dome light on. The last time I was stopped at night, the cop blinded me. By all means, I won't be cooperative, as the blinding light is all I see. That occurred in Duluth, Minnesota. Before getting stopped, I saw a vehicle approaching me rather quickly and the weather was just finishing snowing. I did a quick stop at stop sign because I didn't want to get rear-ended by it. If I knew it was a cop directly behind me, I would have stopped all the way and let her (woman cop) hit me. 
When asked for driver's license, if I don't already have it out, I tell the cop where it is and that I'm reaching for it. They're fine with that and their tension goes down a little bit, as both of us are nervous. No such thing as a typical traffic stop.
