I'm retired now, but here's a short list for you from my time on the road:
1) Never walk between your vehicle and the violator's, especially at night. You will be backlighted as you do it and the violator will know where you are. Also, he could throw his vehicle in reverse and pinch you in between the vehicles. Walk around the back of your vehicle and approach on the right if traffic is to the left or approach down the left side if the traffic is to the right.
2) Make your approach on the non-traffic side. Have you seen the sideswiped officer videos?
3) Leave the violator in his car unless there is a good reason to get him out of it.
4) Once he's out of the car, don't let him go back in without close supervision, especially if getting back in is his idea.
5) Never conduct business with a violator between vehicles on the side of a road. Yes, I know. You want the contact on video. Well, I like my legs and don't particularly like the idea of a cop and violator car sandwich. Do FST's in front of HIS vehicle. Extra mass for another drunk's car to move if your car gets hit
6) Four-way flashers to the rear at night when off the roadway, overhead or blue/amber deck lights when in a traffic lane only. Drunks home in on overheads and amber deck lights.
7) Write your cite standing behind the open non-traffic-side door of your vehicle. If you're next to a guardrail and you can stand on the non-traffic side of it and still maintain control of the stop, do it. It's safer. Don't sit down in your vehicle to write a cite, even if the weather is bad.
8) On night stops, use all of your bright white light to illumunate the violator's car.
9) You can smell a drunk from his right side window under the same conditions that you can smell 'em from the driver's side.
10) Try hard to never, NEVER turn your back to traffic.