We use a table in a Word document. I say we but it's me

I do my table in landscape format so it can be wider.
I have a small column for the date, then a larger one for the day's activities, then a column for each of the parks with the hours and what special events are that day. If it is morning EMH, I place the letters EMH before the hours, and if it is evening, I place them after. The park column has times for parades, fireworks, etc. I also have a column for the number of credits we have left on the dining plan, so it's easy to see and plan.
I don't bother with ADR conf. #s once I have confirmed my ADRs, especially since they can look them up by your telephone number. I do usually put the dining in a different color so that it's easy to see. Flight and car info is also in another color.
It's nice to have a quick reference sheet and have it all in one place.
I also color code the days according to the best days guide so I can tell which parks are best and worst on which days. Light yellow for best and gray for worst. I just picked these because they were easy to see through.
In terms of preparing for trips, I use a large manila envelope and write the date on it, and I put everything in there- tickets, airline and rental car info, hotel info, directions, etc. It is ready to go in our carry-on that way and easy to access. It's also cheap

and it's good to collect things like maps etc. that I want to take home.
It's anal, maybe not as anal as some, but it works for me!

I just realized how ridiculous it is LOL