a. Begin boxing up rarely used items just as soon as you know you're moving.
b. Mark the boxes with the room they came from and an item or two in the box just so you'll have an idea what is in there. This helps with the temptation to open boxes as they come into the house to determine where they need to go.
c. Tape the box tops down so they can be easily stacked in the truck or other vehicles when the helpers arrive.
d. Have EVERYTHING in boxes before the helpers arrive to load the truck.
e. I've mentioned truck twice already, so spend the money on a DIY moving truck. I will never help if this isn't done. It's just too much work and too many trips trying to move someone with several pickups and cars.
f. Have a plan at the new place approximately where you want large pieces of furniture placed.
g. Have an idea where you want all those kitchen boxes placed until you can get them unpacked. In this case the kitchen is so tiny that not all of the kitchen items will fit even when unpacked. So have a plan where they'll go and give those directions to the folks unpacking the truck.
h. Ask one person, maybe the one who shouldn't be lifting boxes but one who wants to help out, to be the one to give directions as folks walk in. If the boxes are labeled clearly by room, then that person can direct folks where to place them as they walk in the house.
i. Line up the volunteers in advance and know who you are expecting to determine if you may need to hire a couple of strong people for the heavy lifting.