I've moved my tanks and livestock a number of times.
When planning and implementing a move the number one priority is your livestock - getting them packed up, moved, and back into the tank. Time is essential here.
When initially planning the move: think about the new location, how long it will take to move the tank (across the room, town, state, etc). Consider the new location: floor support, level, electrical needs, will there be stairs to deal with, etc. Anticipate issues/obstacles with the move: distance, stairs, are there obstacles in the yard, do you have enough friends to help with the move, etc.
Don't plan to move your tank on the day you are moving all the other stuff from your house. Have a day dedicated to moving the tank only.
Before the move, make a lot of new SW (in the new location), have the SW already to go, circulated and heated to the right temp. Have lots of extra SW b/c you may need it. If you have a QT or two, set them up and get them ready to move livestock into, this will give you time to set up the DT and not have to worry about the livestock suffering.
Items to have on hand on moving day are: heavy duty gloves (moving rock); nets; heaters; pumps; siphon; buckets; containers for livestock/rocks. Think about other items you may need.
Containers for the move: I've used ice chests for live rocks, corals, and fish (may need heaters/air stones for them). Action Packers for wet tank equipment (waterproof and have a lid), large plastic trash cans (Brute) to keep some DT water (w/pumps and heaters) and they have lids. Ziplock bags for random tank items. Boxes for all other random dry tank equipment.
Also before the move, think about what livestock you have, any special needs? Are you going to bag your corals? This helps with shifting and damage that can be caused during the move. What about your snails/seastars/etc. Think about what you have and how you are going to transfer them. What additional equipment are you going to want on hand: bags, rubber bands, styrofoam dividers, etc. Are you going to place all your fish in an ice chest (or 2) with water?
What will the weather be like? Will you need a few heat packs or heaters, due to cold weather? Or will you need to try to keep your critter cool due the hot weather. Maybe a little ice on hand is needed, placed in ziplock bags so it doesn't dilute the SW.
Will there be traffic on the roads? Rush hour? Or a sports event (or similar) that causes unusual traffic? Road construction? You definitely don't want to be on the road with your tank and critters in heavy traffic or congestion.
Take time to run through the move in your mind. Make note of anything that you may need.
This is only the beginning.....