I've moved regularly as a child and an adult. It's always bit of chaos but works out in end. As a kid it was adventure and loved camping out in house.
As kids we went through our toys and decided if there was anything we didn't need. We also helped with packing to some extent.
If you can find somewhere for pets to go. One of my dogs gets quite nervous as she doesn't understand what's happening.
Write list of all places you need to change address for, then cross them off and write date you informed them on in case of later issues. Sort internet out as soon as you can.
Get 6 months of post redirected from post office.
Survival kit in car, sleeping bags and pillows for first night if you have them. Tea making kit is last thing to go in car and first thing out with enough mugs for family and movers. Couple bits of cleaning kit can be useful such as bin bags, you will definitely need them for unwrapping. Some scissors for opening boxes and phone charger.
Order takeout first night that doesn't need cutlery or plates.
Label boxes top and side with which room in new house, so movers know which room to put it in without asking. Put brief summary on top and side, so you know what's in it even when they are stacked.
Clothes, sheets and tea towels can be used as padding as well as newspaper. If I've been stuck have ordered tissue paper off ebay. It's worth it if your cherished things don't get broken. Mark box fragile if it's china.
Try to think about your furniture layout before hand, then the movers can put heavy pieces in their permanent positions and put boxes around them.
When you unpack, try and get one room clear as soon as you can. It's nice to have one spot that is normal and will give you hope.I
Remember to take meter readings for the property you leave and the one you move into. I take a picture with my camera, then photo is dated in case of any disputes.
Find out where nearest tip is, you will have lots of rubbish.
Sometimes removers will take boxes away with them, so worth finding out and getting load emptied before they go.
Make sure you clearly understand what is happening with keys in both side. You don't want to be hanging around.