I am in the middle of formulating my plan, this is what I have done so far (I will be there 12/25 - 1/1) I have made PS ADR's for lunch and dinner for just about every day, I figure this way I have a way to take a break from the crowds and have a good meal. If you are having problems getting ADR's think about late lunches or early dinners or try Boardwalk or DTD restaurants.
I signed up at touringplans.com for thier suggestions. You plug in your date and park you plan to visit and it gives you a detailed plan of what attrctions to hit and when. For $7 I thought it was a good idea. I don't plan to follow it step-by-step but as a general guide.
I am also planning a spa day at Saratoga Springs. They have many spa treatments and yes for childen too! That may be great way to spend a few quiet hours with your daughter and maybe some lunch and dinner later at DTD. I think this will be a great respite from the parks and crowds.
Good luck on your planning.
Mike