fun and experiment with it! that's the fun in acting.
use the audience. though you're technically not supposed to break the fourth wall (in most productions, at least), they're there. they're there and you have to work with them. and don't forget that them being there is a good thing. a great thing, rather! feed off their energy. there's nothing quite like it.
when the audience laughs or applauds, give 'em a minute to shower you with affection. okay, not a minute, but feel the scene. let it die down a bit before you progress. feel where they are and where you should go with the scene. this may seem a bit 