IMO...
1. Do Breakfast in Fantasy Land. We got to ride to it in one of the Main Street cars - it was great fun

We're not big breakfast eaters so we grabbed some breakfast and then rode several rides long before anyone else ever arrived.
2. Big Thunder Mountain is, IMO, better at DLP than WDW. Certainly good fun!
3. The fireworks in the evening, obviously. I took my friend when we were 18 and he LOVED it (yes, an 18 year old guy LOVED the Disney fireworks - this is testimony to how good they are if ever I saw one). Hint: if you can't find a bench, sit in front of a lamp post on Main Street/towards the castle - we waited sitting on the floor for two hours and it was nice to have something to lean back on.
4. Annette's diner was WONDERFUL. We ate there for lunch on our last day and were so stuffed that we didn't eat again until we got home in the UK at 11pm! The milkshakes, the burgers, the desserts...SO good
5. Pirates of the Caribbean is another of the rides which is actually better at DLP than it is at WDW. There are two short drops rather than just one.
Other hints:
Star Tours, Honey I Shrunk the Audience and Armageddon and the Backlot Tours (Catastophe Canyon) are great rides. Space Mountain is MUCH more intense than at WDW here - it's mega fast and mega-scary.
There's an ESSO garage right outside the Santa Fe hotel. It sells much much cheaper goods than you can find in the theme parks.
The Rain Forest Cafe is great - take a look around even if you don't eat there - the food was overpriced IMO but the atmosphere is great.
When greeting a cast member, greet them in the language you want to converse in. We found that if we said "Bonjor" back to them, they rattled on in french - whereas if we said "Hello", they knew to speak in English (our french ain't great...)
My DLP photos are here:
http://www.angelfire.com/wizard/hunnie/photos/disneyphotos.html
We stayed at the Santa Fe and travelled in July - the weather was great
