Short trips -
We've done one that focused on WL (arrival day), MK rope drop rest break, and back for nighttime (day 2), and then a day at FW with lunch and trail ride (day 3). Hyper-focusing for that trip really allowed us to take in all of the features of our resort and get our money's worth from that high room rate.
This past spring we arrived early morning at the Dolphin and spent the day at Epcot (day 1), rope drop DHS, break at the pool and nighttime at DHS (day 2), AK and dinner at AKL (day 3) and a LONG day in Epcot (day 4). That was really a longer trip than it should have been. Could have skipped the AK day in favor of resort time.
Coming up - an early arrival and time in my resort, followed by
MVMCP (day 1), convention with evenings in the parks, probably just MK (day 2 and 3) and then a day at MK (day 4) is on the agenda.
Lessons I've learned: Avoiding the temptation of overdoing it with park hopping and also just doing the area of property close to our hotel is very successful for us. Building in lots of time at the resort to really take it in is wonderful. You can do that when you know you'll have time in the parks on another trip. Have some "bucket list" or "first" items on the agenda for your short trip too. That keeps away the feeling that you might be missing out. Take the area of property where you are staying and build your trip around there. Choose places that have the best access with transportation to make the most of your short time. We don't do AK on short trips when we are at MK hotels.
Differently - I make fewer ADRs for short trips. I can handle eating QS for those few days more easily than on a long trip.
Going into this time of year, I think MK and Epcot are at their best. I would not plan lots of time at HS unless you are big Star Wars fans. We are and easily filled a whole day. Pick either a rope drop or afternoon/evening and save the rest for another trip. Or skip it. AK is ho-hum for me. I always feel like we got it wrong. Maybe when night time and Pandora is fleshed out that will change. It just doesn't have the magic that Epcot and MK have for me. And it's just too big and the shows are too long for me to squeeze it into a half day.