You need more than a week to do it right . . . but prepare in advance and do as much as you can!! MUST SEES...
MGM Studio's "Indiana Jones Stunt Show," "Who Wants to Be a Millionaire," "Backlot Tour," and, for the brave, "Tower of Terror."
Magic Kingdom: "Space Mountain," "Splash Mountain," "Snow Globe Parade" (afternoon).
Epcot: all of the Country showcases, Body Wars, the Living Seas.
Animal Kingdom: Safari Tour, Asia and African jungle walks.
Downtown Disney is a blast, as well as Blizzard Beach and Typhoon Lagoon. You just can't do it all in a week!
Quick Tips:
Go to parks as early as possible. Travel off-season (when crowds are smaller). Find the most comfortable walking shoes you can and bring two pairs -- alternate day to day and your feet will thank you. Of course, bring sunscreen, hat, or visor, wet wipes, money (in a secure location), and bottled water. Since bags are searched on the way in, you can save time by carrying everything on your person. If it rains, ponchos are available in any shop for a nominal fee(). Plan your day to allow for some downtime. Consider eating a big lunch at your favorite restaurant -- it's cheaper, less crowded, and you can walk it off!
Best Way To Get Around:
A car is a must (unless you are staying at a Disney resort). Keep your parking pass -- if you're park-hopping, you won't have to pay at other lots. ParkHopper Pass is best way to go -- you can see the most and it doesn't expire. ParkHopper Plus gives you the four kingdoms plus water parks and Pleasure Island. Shuttles and monorail are available from resorts, but car is best bet.