I go into a trace about twenty minutes after I arrive, so don't ask me for advice.
Except this one thing: make a list, or you will wander aimlessly, and the time will go by in a blink, and all your money's gone.
One more thing: remember to bring your list.
The list can be things you need, things you've always wanted, things you don't really need at all, people you want to meet, seminars you wish to attend, guns you wish to see, etc.
Best of all, this is such fun.
And bring an umbrella......
Acer