Traveling in California this last week kept me from being able to post. But here's a real-life infographic from Disneyland in Anaheim, CA. At the entrance to each separate attraction, is a posted wait time estimate, but they are all combined on this information board in the center of the park.
Not willing to wait an hour for the new Finding Nemo Submarine Voyage? Pick a handful of other rides that you can get through in the same amount of time and maximize the money you spent getting into the park.