Hi

Sound checks, firstly play some material that you are NOT going to use in the concert, something that pushes your instrument to the level you will be in performance, nothing complex just fun mad and probabaly loud.

ALWAYS uae monitors when possible paticularly on out door gigs and in big halls. You can probabaly don't need to use them in small rooms.

Know what your tech spec is and give a copy to the sound man a couple of weeks before the performance and DONT change this in between times.

Know what sound you want, bass, treble.

Get to know the sound man and get him on your side they can make or break your performance!!

Be specific, efficient and be friendly people always want to help you if you are nice to them.

IF the sound is really bad and the hall is not to big MAKE THE GIG ACCOUSTIC, just because there a PA does not mean you have to use it. I have done this on more than one occasion.

relax and enjoy the night

Cheers, Sam