We went on our first trip Dec. 28 to Jan 10/03, used our 7-Day PH's fully. Park hours went from 8am to 10pm or midnight some days. We exhausted our kids, barely stopped to eat & still did not see some of our "top" priorities.
Do map out some family, personal faves BEFORE you go. Remember these are yours & your kids faves. Doesn't have to be the TOP ride everyone says is best there (but do keep a sense of adventure when you plan to try new things!). Fave characters, fave countries, foods to try that YOU want to do. I really recommend the Birnbaum for Kids book (great souvie after too) and the Unofficial Guide -- it really helped us understand how to stay ahead of the packs.
Yes, yes, yes GO EARLY. Take advantage of EE/EMH. And be there for the beginning of that EE. We noticed a difference in crowds in the latter 1/2 of the hour. We got a lot more done & out of way (or should I say "enjoyed") just in that first 1/2 hour.
Do learn about FastPass & use it. Send 1 parent off to get the FP's while other takes kids into line-up or in direction of heavy line rides. Read your FP expiry times for when you can get your next one -- it changes. Stock kids own waistpacks with snacks, etc., carry around drinks. Munch when you're waiting for parades as well.
Oh and I meant "map" out. So much time was saved once we learned the maps, including where the FPs were, where the parade directions were (especially if you were trying to avoid them that day!). Do it before you go.
Big time consumers were any park-hopping we did time was really eaten up with the transportation & package checks. And trying to fit in all the shows, parades, fireworks was a logistical nightmare I wish we had been better prepared for ahead of time so we weren't always trying to rush from here to there and dragging family members past stuff they wanted to see and we never got back to... I'd really recommend checking the other sites for show times before you go, prioritizing the shows you want to try (they're really not ALL that great for everyone) -- you CAN't do it all, and save any park-hopping for going to Epcot after the others close.
Sorry this is so long. I read & was told over & over that you can't do it all before we went. It truly can't be emphasized enough to prepare for that. Pick your priorities as a family, map them before you go & be sure to do them. There are some biggies we missed in our rushing about to get the MOST done. People are amazed at all we did do. These "misses" is what this ultra-planner Mom misses the most when we talk about our trip, look at photos, etc. Have to go back so we can relax a bit!!! LOL!
No matter what though you will still be in the most magical place with your family. Even when things go wrong (illnesses, falls, tantrums, cameras that won't work, whatever) remind yourselves of that -- you ARE there & together and everywhere you look is magic no matter what you manage to see or do.