Wow, where do I begin.
Don't overplan!!! WDW is big, very big and there are far too many variables at play to plan every minute of your trip. A simple thing like catching a bus from one park to another can take up to an hour. I plan my meals and take it from there. What I'll generally do is go to a park in the morning and stay through lunch, then hop to the park where my dinner is booked. I generally like to hop mid-day (its just my style). Those that try to plan each and every move are the ones who end up frustrated at an extra long bus stop or some other variable. I don't know how often I've overheard someone at MK say at 5:45 "well we have a dinner at Epcot at 6pm, guess we better start making our way there"...guess what, not going to make it.
Also, I've learned that if a park has EMH in the morning, it is often the most crowded park of the day (since everyone else shows up at park opening ON TOP of those already there), so I go to another park that isn't doing EMH that day. Also, if a park has EMH at night, that park will tend to be the LEAST crowded the following day (since most people won't go to the same park the next day as they did the night before).
Don't follow the crowds, use fastpass and use the tip-boards. I've been many times and paid attention, memorized the park layouts, transportation, etc...and I don't wait in long lines anymore. Once I rode every ride at MK in just under 5 hours...and have pretty much done that in each park, just by paying attention to where people were and where they were not. Learning all the shortcuts through the parks is a benefit (We were first in line for TSM last year even though we were far back from the rope when it dropped). Riding rides during parades (when everyone else is watching), and having lunch early and riding rides while everyone else is eating lunch at noon. Of course there was the time at
Disneyland when a fastpass machine malfunctioned and gave me 50 fastpasses, but that's a story best saved for later.
One other thing, I book my meals at 7am on the first day offered and have never found one to be booked. I eat Le Cellier twice on each trip and always am able to get exactly what I want. If there's one thing to definitely plan, its your meals. I've always got the dining plan for many years now (and many name changes). On my honeymoon, the trip cost $1,200 and we ate just over $1,300 in food.
Ok, I'll stop, for now...
Oh! and if you are going to skip an ADR call dining and open that spot up for someone else. 
