Watch professional guitar players
The first thing you need to do is to spend a whole lot of time watch professional guitar players on stage. Watching these people will give you an idea and a sense of purpose over what it is that you need to do in order to be able to beat the odds.
This will also help you develop a sense for what needs to be done, and how your body and arms need to be positioned in order for you to get the edge on everyone else.
One other thing that you can go on and add to your list of things to do, is to learn power moves.
Power moves are moves that require you to use your whole body to perform intricate moves, that make you look a whole lot flashier than most.
It is no easy task to do this, since you need to practice power moves a lot. However, they range from flips, to stage slides, to just about any radical thing that you can think off.
Every great air guitar player needs to have his own signature wardrobe or costume selection. This makes you stand out even more than the others, and sometimes you can also go on and find sponsors who might be able to help you out.
Just make sure that what you are wearing is within the rules of the competition.