I either practice through my live rig or play acoustic. I like to play my guitars and basses unplugged to practice playing, or I'll just use an acoustic to jam. When I practice through my live rig, I practice like I would play live. Every jump, every move, every nod, every bit like a live show. That way, when you get on stage, you are not trying to perform. You just play like you always do.
Plus, it makes band practice soooo much more fun.
"We never let the music get in the way of our stage act." -Pete Townshend