im in the same boat. I haven't taken finals before since I have always gotten exempt. Im doing it like this..
Im not stressing, just getting my shit done. Remember, you have already pretty much covered all of the info. There are a lot more important things to stress about but get your shit done.
Sleep Sleep Sleep- I have been having trouble getting a lot of sleep, but this really helps your ability to think. Although you may thing aderall and red bull all nighters are good, you also need sleep.
I terms of studying, I usually don't listen to music, but I'm listening to spotify radio, and studying my material. Take notes on what you don't get / need more review and come back to it later. I am prepared with good snacks, drink a bunch of water and Im dipping right now for my nicotine addiction.... good luck man and remember its just finals..