1. Check out a Crowd Calendar: There are several crowd calendars available online, which predict how busy the parks will be on any given day. I like to look at several different calendars, to compare the predictions. This info, coupled with the park hours, should factor into your decision on what park to tour each day of your vacation.
Bonus tip: visualizing your schedule can help you plan better. If the Disney app’s organization isn’t cutting it for you, try using spreadsheets, or other calendar apps. Or, go low-tech like I do and just write it all down, somehow my own handwriting helps it all make sense!