You have to concentrate to move one room at the time, move the boxes to an empty area so you can have everything at the hand, separate some things that you won’t use it anymore and you want to donate or sell it.
Put the everything that you may need it daily or weekly aside so you can get them easily and you won’t need to dig around boxes, start to pack before the move so can you will relieve some stress you may have on that day. When you pack try to put the heaviest item at the bottom and the lightest at the top so when you need to unpack it’ll be easier. When you finish packing try to tag them so you can organize everything at the moment of unloading and know what box belong to a specific room or part of the house. Keep valuable documents all the time with you.