When ours were little, it was about
1) gear carrying.... Stroller and backpack. We used a graco that had a nice size compartment below, so we were able to off load items. camera,backpack., packages.... Our kids still napped at that age, so it was critical to stay in the park all day.
2) Create a rough itinerary- I use an excel sheet and outline all the park hours, extra magic hours by park, sunrise/set, parades, special events, adr..... This provides with some idea of flow of days, but does not tie us into set plan. Like for EMH in the evenings, we almost always have a late start the next day. I also have my running prep list and reservations # on this sheet. I have even started listing ticket #, as well taking pics of teh # in case they get lost. not necessary with magic bands..
3) A supercalifragilisticexpialidocious dose of mouseatude. It really is ok to be silly with your kids, have fun and enjoy. Skip down main street, before the park open cause you got adr at the castle. Or eat all sorts of different foods at epcot. Trade pins with your kids and cast members. Ride the same ride 3 or 4 times in a row. (no dumbo for me). Give your kids the reigns and let them park tour for a few hours, leading you to what they really want to see. Never thought I would be asked to goto hall of presidents.
As a former cast member, it may sound odd, but there are way to many adults who dont really get what Disney means to a guests, aged 1-99. They come in with preconceived notions, are bent on not having a good time, cause it is disney or their neighbors went and it sucked,or maybe they had a bad trip, so it has to the same way for them now with their kids. NOT saying you are these people. Point being, if one is spending the money, why not make lemonade, lemon smoothies, lemon meringue pie and lemon filled doughnuts... That sounds sweet to me. Its all about the mouseatude.