If you find your snare head is filled with pits after only one night's use but your toms are smooth, you need a different type of head on your snare for your style of playing. If you still can't figure out which type of head is right for your sound, try listening to other drummers play their sets. Listen to the overall sound of their drums as well as the sound of the heads. If you like it, see what they're using. Some drummers swear by one head on their toms or basses.
Most drummers use double-headed toms.
It's all a matter of the kind of sound you're looking for. It just takes a bit more time. Some drummers say to tune the bottom head slightly different from the top. This will deaden the drum's overall sound while, at the same time, broadening its tone. Two medics carrying a stretcher will do a much better job if both are moving at the same speed.