Waltzes
I try to kill in time to the music. Sometimes I will mute all the game sound effects and play with just the music. I find it works best when I am playing scout/soldier/pyro/huntsman sniper. It does not work as well with other classes. For spy/medic/heavy I do no music at all. For engineer/demoman/regular sniper/shortstop scout it does not really matter.
Waltzes
I try to kill in time to the music. Sometimes I will mute all the game sound effects and play with just the music. I find it works best when I am playing scout/soldier/pyro/huntsman sniper. It does not work as well with other classes. For spy/medic/heavy I do no music at all. For engineer/demoman/regular sniper/shortstop scout it does not really matter.