Declutter as if your life depends on it.
Pay packers if you possibly can. Be aware that they will pack absolutely everything, so get your first 24hrs stuff hidden in your car before they start!)
Colour code each room and colour in floor plans to match.
Write on all 4 sides and the top of the boxes in the correct colours for the relevant room.
Get hanging wardrobe boxes for moving clothes. (You can so keep using them when you're waiting for new furniture to be delivered.)
Blutak the plans on the front door or in the hallway of the new house.
Make signs for each room in the right colour and blutak them to the top of each door frame in the new house.
Get a floor plan of each room and draw on it where you want the big furniture to go, then blutak it on the relevant door in the new house
Put little colour stickers on the furniture so that it ends up in the correct room in the new house.
Be very aware that garages, sheds, attics and basements take forever to empty and contain far more shit than you could ever imagine. Double the amount of time you think you need to deal with them.
Your basic plan for moving day is to minimise the number of questions that anyone needs to ask you, and the colour coding plans thing works brilliantly. (I've moved house over 20 times, including internationally, so I've learned a thing or two.)
Good luck OP! You've got this!