Some people aren’t as enamored with Disney as we are and one of the reasons I hear is the crowds. I understand this as the crowds are about the only thing I don’t like about Disney World. There is a way to avoid this to some extent and have a little more peaceful vacation.
One major way to find some peace at Disney World is to not try to do everything in one day or even in one trip. Take a mid-day siesta or at least rest. Lounge by the pool or pop in a DVD (free for DVC members). If you are in the parks, there are a few secluded spots. A particular favorite of mine is in the seating area in the back of the Great Britain Pavilion of Epcot. It is beautiful and almost always quiet. In the Magic Kingdom the People Mover in Tomorrowland is always quick to board and a peaceful ride around Tomorrowland. Hollywood Studios has seating available in various spots; some more quiet than others. Animal Kingdom has some benches tucked away in various spots in the shade. The Flights of Wonder is a bird show that is relatively peaceful and there is always available seating.
Another thing to consider is time of day and park. The park opening and close to park closing has the thinnest crowds; with midday being busy almost always. I am not an early riser, so I opt to try to stay until park closing. Magic Kingdom is the busiest of the four parks, which is understandable being the “most magical” park to most folks (myself included). Usually the park that has extra magic hours in the morning will certainly be the busiest throughout the day and sometimes into the night. The park with the extra magic hours in the evening will also tend to start to get busier as evening approaches.
Peace at Walt Disney World is attainable. Expectations going into your vacation will partially determine how attainable this is for you and your family. If you expect to get through every or most every ride/attraction in one trip you may feel very stressed and it may ruin your trip. If you come in with the expectation that you can/will return and try and take it slower and just see your must-see attractions you can find peace even in a crowded place like Walt Disney World.