You can get a lot of your questions answered if you spend time on these boards reading and posting questions.
A low cost resource I have found valuable is:
TourGuideMike -
www.tourguidemike.com (Advice for everything WDW related including parks, touring, dining, hotels, transporation, etc.) - developed by a paid WDW VIP tour guide
Another soon-to-be released resource I plan to use is:
RideMax -
www.ridemax.com - specifically focused on itineraries.
RideMax has had a good track record at
DisneyLand. They will be releasing a WDW version in a few weeks.
General advice you will find here about WDW:
1. Get to the parks early when the crowds are lower
2. Take afternoon breaks to the hotel, especially when it is hot
3. Take it slow - don't burn out
4. Start planning far in advance
5. Try to avoid busy season