DW & I always have at least one trip in the hole. We are fortunate enough to be able to fly "Home" twice a year, so we keep two trips in the planning stages ahead of our next planned trip; one reserved at the 11 month window,

and one on the official family calendar (Outlook - need my computer don't you know!

).
To keep it alive, I always start a spreadsheet as soon as the trip is conceived. That means we have three to work on at any one time.
The spreadsheet has evolved over our trips in the past years, so it really is just a fill-in-the slots type game to play. As the weeks grind on, a little more information comes into focus and goes on the appropriate sheet. The sheets hold date, day of the week, which park has EMH (Eextra Magic Hours), slots for morning, noon, and evening destination or plans, and of course places to put our ADR sites, Res. #s, and time. I find places to park our flight information ME #s, etc. AS we get within a few weeks, all is planned, the sheet holds the next master plan, and off we go!
I know, I know, , , many are saying "that is not a vacation - too many plans". We usually vary our plan, and can always cancel ADR if we choose, but try to get into your favorite place during a short visit "Home"!
The point of the spreadsheet is to keep focused on the next adventure; it keeps the excitement of DVC fresh and fun, and working the sheets always creates good conversation and dreaming with DW.
DVC - have fun with it - wear it out - you're paying for it!