Some agencies issue flashlights. Some don’t. Some issue crappy flashlights but allow you to buy your own. If you are not issued one, do your research on what you like best and buy one. I also recommend that you carry a small secondary flashlight.
You have two lights, don’t you? The small one is for your belt. And here’s why you need it. It is day watch; you chase a perp into a building. Now, you need a light. Or, it is night watch and your primary light goes dim, bulb blows. No worries for you because you have your backup light.
Note: Some agencies regulate what flashlights you can carry. Before you buy one, make sure your agency permits it.
A Hard Surface—You will need a good sturdy writing platform. In other words, get a clipboard. Don’t drop a fortune on an expensive one but find something to write on in a bind.
Cheap but Good Pens—Every graduation, somebody’s mom gives them an expensive pen and pencil set. Leave that one at home. Otherwise, the first ticket you write with it, the violator will keep the pen. Go to Office Depot, Staples, or whatever and buy some cheap but good pens. You’ve been in school enough to know what you like and what you don’t like.