Ultimately it's up to what your family is interested in.
I've found that Adventureland and Frontierland are pretty empty in the morning...and using FP's and all in June of 2007 I had the Jungle Cruise, POTC (3times), Splash Mt. (Twice), and Big Thunder Mt. all done before noon...and we got there about 9:10AM.
I've also found that Tomorrowland (with the exception for Space Mt.) is pretty much no lines. You'll need a FP for this ride.
Now if you have a person that wants to visit characters...then you will need to be a Toontown as soon as it opens...Catch the other characters first because Mickey's line seems to move pretty quick.
Animal Kingdom...
I recommend catching the 1st show of the Lion King...let those that want to meet the Characters...get a FP for the Saffari...checkout Rafiki's Planet Watch and the Trails near the Saffari. Take your Saffari...The go get a FP for Mt Everest then check out Dinoland USA. After the Parade this park empties out with the exception of Everest. You can probably ride Kali river Rapids over and over...I've also found if you catch one of the last Saffari's you can get there with no wait and I usually see more animals.
Epcot...
FP Soarin' then get in line for Test Track. everything else just seems to flow with little or no wait after that...or at least thats been my luck.
DHS...
No clue...this park was laid out by a drunkard...no flow...I really don't like DHS...just not my cup-o-tea.