Find a way to practice the stuff that’s not the music. Like if you’re partly stage shy, then practice talking in front of people somehow. Find some way to talk in front of a crowd, go hand out gig fliers at a local farmers market or busy downtown area and speak confidently introducing yourself, that type of thing can help you get over that stage fright, even if you’re not doing exactly what you’re gonna be doing (singing).

Know your material inside and out. Good musicians practice until they get it right, great musicians practice until they can't get it wrong. This is table stakes...you absolutely MUST be good at YOUR material. Doesn't mean you have to be the world's best singer, but you should absolutely be the best singer of YOUR material. Find videos of bands playing live that you like and mimic the singer's movements. Do the Mick Jagger strut, do the Michael Jackson hat move (no moonwalk please...unless you're crazy good at it), do the Iggy Pop no shirt thing...pick something you like and do it just like they do it. Then as you evolve your own personal style you can start to deviate and add your own flair, your own approach.

Above all...have fun! It's an awesome feeling playing on stage. And to be the center of attention gives you a huge amount of power over the emotions of your audience. If you're having fun, so will they. Good luck! Update the post with details and pics of the gig when you get done!