Lines 13, 20, or 21 move fastest at the Disneyland entrance.
Adults riding with kids.
Example 1:If Mom wants to ride Space Mountain but Dad and kids do not, mom can use the
single rider line which is much shorter.
Example 2:Mom and Dad both want to ride Space Mountain but they have an infant who can't. All 3 wait in line and when they get to the front, tell the staff you want to trade off. Mom rides first while Dad and baby wait; when Mom is done, Dad takes her seat and rides immediately.
Lines that move quickly even though they look crowded: Haunted Mansion, Buzz Lightyear, Pirates of the Carribbean, Jungle Cruise, Indiana Jones, and Tower of Terror.
When the park opens, work your way backwards through the rides instead of stopping at the first attraction you get to. You will beat most of the crowds.
ToonTown: Go right when the park opens.
Adventureland: Go at night.
Matterhorn: The line that wraps around the Tomorrowland side is almost always shorter.
New Orleans Square: Go a couple hours before closing.
The line for Dumbo takes forever but you just have to do it or your kids will never forgive you. Go right when the park opens for the shortest wait.
Ride at dinnertime. Most people eat dinner between 4-6 pm, so lines will be shorter.
Ride during parades. Catch the parade at some point but take advantage of shorter lines too.
FastPass. It's a free ticket system within Disneyland that will save you tons of time.
Enter early. Show up at least a half hour before opening and bring something for your kids to do while you stand in line.
Take an afternoon break. Spend the afternoon at your hotel, when the park is most crowded. When you return, the lines for the small children's rides will be much shorter.
The Disneyland Train does a circle around the park, so use it for transportation.
Tuesday, Wednesday and Thursday are the least crowded days at Disneyland.
Don't get stuck in the parade! Know what time they start so you can get out of there if you don't plan to watch it, or you'll be trapped.
Start with Adventureland and move around the park in a clockwise direction. I've been told this helps cut down all the criss-crossing through the park so many times. Also, most people tend to go counter-clockwise (for example they start with Tomorrowland). So you somehow seem to deal with less crowds if you go clockwise.