At Universal Studios:
-Revenge of the Mummy (dark coaster / thrill ride)
-Jaws (although look for the Amity Boat Tours sign in the park, since it's not titled Jaws)
-E.T. (riding on bikes with E.T. to his home planet)
-Men In Black (like a giant arcade - shooting laser guns at aliens whilst in a moving car)
-Animal Planet (aka Animal Actors) stage show
-Disaster (see an earthquake from an underground train)
At Islands of Adventure:
-Spiderman (excellent 3D/real thrill ride)
-Hulk (great coaster)
-Dueling Dragons / Dragon Challenge (great coasters)
-Popeye and Bluto Bilge Rat Barges (river rapid ride - extremely wet but fun!)
-Jurassic Park River Adventure (animatronic dinosaurs with big water drop)
-If you're going after the HP opening, Forbidden Journey!
Food-wise, at The Studios I enjoy Mel's Drive-in. At The Islands, Mythos and Thunder Terrace Falls are pretty with good views.
Here's the most recent brochure:
http://www.universalorlandovacations.com/pdf/2010_UNI_brochure.PDF