Don't overlook the picture spots in the park! Though not terribly original, you are bound to come out with a great shot! I've learned that Disneyworld likes to "eat film"! I can shoot six rolls and come out with about 10 good pictures! It's heartbreaking sometimes. then again, I need a new camera.
Another tip - If you don't want to buy something, most stores (except for art galleries) allow you to take pictures! Take some of your friends and family in funny hats, or hugging a stuffed animal, etc.
An old photographer's tip is, take 2 of everything becuase you never know how one will turn out (unless you have a digital camera).
Also, don't hesitate to let the kodak folks in the park take some good pictures. I've found that in EPCOT, they are very creative! Ask them to be creative and they'll unleash a flood of poses!
One way to go about it, is to have an underlying theme to your pictures. One quirky family in the Disney Magizine took pictures of thier 3 boys in front of the restroom signs in different parks! Why not try something silly? We have some funny ones from previous trips of park trash cans, and of me drinking from a bottle of water in front of every ride, or me burried in a map in front of the bathroom.
Whatever you do, have fun with it! Half the fun is shooting the pictures (even if they DON'T turn out). My DH wishes he would have brought a waterproof camera to Typhoon Lagoon when we went though! We all had a blast, and I'd recently lost 65lbs for the trip and felt killer in my new swim suit. I have 40 more to lose for this trip in Decemeber!
~J. Darling