Aux Percussion

The best approach to aux percussion is to figure out what you can play to best serve the song.  Sometimes, this means playing only shaker and tambourine.  Other times, it could entail playing intricate tom and glockenspiel parts.  Really listen closely to each song for auxiliary parts and know them before rehearsal instead of trying to be creative on the spot.  Most songs have a tambourine part, shaker part, or cymbal swells that aux percussion can help out with.

Aux percussion adds interesting texture and dynamic variation to the music.

Collaboration with the drummer and audio engineer is always a good idea.