Packing:

Start sooner rather then later, start 30 or even 45 days before your move date, that way you can do a little each day/night so your not overwhelmed that day before your move.
Recruit some help, get the kids to pack up there toys, stuffed animals etc.
De-clutter, lets get rid of the old stuff you don’t want anymore!
Donate.
Throw away.
Sort.
Re-use original boxes from small appliances, computer screens, TV’s etc.
Photograph/video your items before packing.

Pack books in small boxes, If you can’t lift it neither can we (not really but
the lighter the box the better).
Label your boxes, not just on the top but on the side as well.
Color code boxes for what room they go in in the new house and post a colored post it or index card on the door to each room.

Pack an essential box, change of clothes, toiletries, phone chargers etc. (you never know what might happen between point A and point B).

Parking:

Be sure there is plenty of parking for the moving truck and ramp/lift gate, especially in the city, secure parking spaces outside of condo/apartment building.
Check with parking enforcement/authority in advance of your move about reserving spaces on the street.

Heat and A/C

In the winter turn the heat down or off, the movers will get really over heated if your heat is running.
In the summer turn the A/C down too, we like a cool house!

Water and food: Have plenty of water and snacks on hand and ask a neighbor to fetch lunch for you and your family.