Make sure to separately pack the things you need on Day 1. Toiletries, a change of clothes, bath towels, hand soap, dish soap, etc. Also things like toilet plungers and fire extinguishers, since you definitely don't want to be without one.

Consider what you might need to buy new, or what is worth replacing instead of moving. For example, some cheap furniture might be worth replacing, since it probably needs to be disassembled and reassembled anyway, and it'll be the difference between a smaller truck and a bigger one. (Plus the cost of labor to move it, if applicable).