Whenever I'm stopped, I pull over out of traffic as soon as possible, put the driver's side window down, remove the keys from the ignition and put them on the dashboard in plain sight, keep my seatbelt on and put my hands on the steering wheel at 11 and 1 o'clock. If it's dark out, the interior light goes on. My goal here is to make the officer as comfortable as possible in a naturally uncomfortable and unknown situation.
By Texas law, if I'm carrying concealed, I have to let the officer know that. My CHL is behind my DL, and I hand the two of them to the officer together.
Officer stress level is directly related to your chance of being written a ticket: if you can keep it low, you'll both be happier. I don't know what state you're in, but you may not have to inform the officer. If not, don't. It'll only raise his blood pressure, and if it's only a traffic stop, chances are he won't be searching the vehicle anyway.