Use a reverb in one of the aux sends... On the reverb make sure u cut all frequencies bellow something like 300-500 Hz (meaning that all sounds effected will only have frequencies above that level being effected).. use a little reverb in almost all sounds (many people don't like using over Bass or Bassdrums)...

Use wiselly the pan (leave bassdrum and bass alone in the middle).

Image that your sound is like a play on a theater.. keep the main actors at the front all other distribuite left and right of center with the pan and front/ back with the reverb (depending on they're importance for the play)..

Z