My advice is also, whatever your practice speed, shoot 90-95% of that ability and you will do fine. IDPA is not necessarily a game of pure speed, but who can get ZEROS in the least amount of time. Back off a hair, get your hits and you will do just fine. Do not beat yourself buy hitting NT's, getting procedurals, etc. But no matter what, always shoot your game!!
For practice, always practice at 110% and shoot matches at 90-95%. Set up drills/scenarios that are way more difficult than what you will see at a match. Makes the matches look easy. That method always helped me improve.
(Your welcome Mike )