First off, John, welcome to the brotherhood. Best of luck in your new avocation.
My advice is to find veteran officials in your area who have achieved success, worked district playoff, state playoffs, etc. Buddy up with these guys, go to their games with them if you are invited to do so. Sit in on their pre-game conferences. Have a coffee with them on off nights. Learn, learn, learn.
Remember what Mark Twain said: "Experience is the world's best teacher, especially when it is someone else's experience."