for practice only, it's easier/much cheaper to soundproof your drumset than the room. I used to scotchtape alot of kotex pads (toilet paper) to the cymbals/shells. then buy one of those sticks that's like a bunch of satay sticks bunched up together.
for your kickdrum. stuff a really big cushion under neath if any possibility. "elevate" otherwise the floor will be boomy. then stuff pillows pressing against your batterskin, take off the resonant skin. so all that's left is the "attack" of the kick.
then be nice to your neighbours.let their kids play on your drumset etc.this is called "social sound proofing".