Seriously,tricks aren't all that important.Just make sure you guys play your music with emotion and not like its 'foreign' to you.

not sure what kinda music you play,but staying in motion at appropriate times is important.If not headbanging or moving your upper body in some way your eyes should alway's be on the crowd(you can look at an 'imaginarey person' and it will look as if you have your eyes at the audience)and if not the crowd,then on your guitar while doing a solo,complex riff e.c.t.