Get to the parks at opening. It is impossible to stress this enough. You will get more done in the first 2 to 3 hours of the day total than you will if you wait and get to the parks at 11 and stay there the rest of the day. You can always take a break midday if you need to catch up on your sleep. Have a list of a few things that you must do in each park and get them done first then look at anything else you do as a bonus. You can't do it all anyway so don't even try. Pack your patience and your sense of humor, you will need them. Don't forget that you're surrounded by magic but if you don't stop and just look around you every once in a while you'll miss it. Have a great trip!