Well, I said this all the time on another forum but for me, I can't subject myself to an absolute strict schedule because odds are, I'm going to break it and not follow through! So for me, normally, I plan my day based on priority so my favorite must rides come first because re-riding is not a problem. Getting at least one ride on favorites does! Then, if there's a large time window between my FP time and the current time, I'll explore other rides in all likelihood. The FP+ and MM+ is going to complicate things but I guess what I'll do is pick the three attractions I must ride or I'll never forgive myself for doing so. Usually, I'm done with most of my favorites before lunch and then, in the afternoon, I either go on other attractions, stop by and do character meet and greets, see shows, etc. Bottom line, you should have a basic plan but it shouldn't be too extreme. Know what rides are going to be popular and tackle those first (I would advise getting there as soon as they open to avoid the crowds.) Know what you and your party value strongly and prioritize your biggest needs being first. That's all I can really say in terms of planning your day.
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"All my life I wonder how it feels to pass a day, not above them but part of them.
And out there living in the sun, give me one day out there, all I ask is one to hold forever. Out there where they all live unaware, what I'd give, what I'd dare, just to live one day out there."