Hi - I wrote an APUG article about gig photography a few years ago. You may get some ideas or tips from what I have learnt over the years. Cheers.
http://www.apug.org/forums/forum216/...-practice.html

p.s. some of my work can be viewed here and also in my APUG gallery
http://www.tonyeganphotography.com/gallery_music.html