I use Touringplans.com's crowd calendar to figure out which parks we want to be at on any given day. Then I look at where we want to eat & figure out those ADRs, matching restaurants to where we'll be.
In my mind, I organize my days by morning, afternoon, evening. For example, if Touringplans recommends going to MK one day, I'll mark the morning & afternoon at MK. My family likes to take a break at the hotel in the mid-to-late afternoons. Then, for the evenings, if we want to be low-key, we head to DTD or stay in at the resort. Otherwise, we try to head back into either MK or Epcot, avoiding whichever one has evening EMH.
Have fun with the planning! It's like a jigsaw puzzle, but luckily, there are multiple solutions.