There is more that goes into preparing for a move than packing and boxing things in your home.
If you are using a moving truck, or hiring a company to assist with your move, you will need to think about where that truck will be parked. If you are in the city, or a neighborhood with busy streets, you may need to secure a parking permit. You may do so at your local police station. If you live in an apartment building, you may need to reserve the freight elevator and loading dock with your building manager.
Depending on the day of the week that you are doing your move on, the freight elevator could be in high demand, and so you will want to reserve it a couple weeks in advance. The loading dock is another issue you will have to consider if you live in an apartment building. As with the elevator, the loading dock can be in high demand on weekends and at the end of the month, and that should be taken into account when planning your move.
Your apartment building may also have insurance requirements for moving companies. Check with your building manager to see what those might be. Often, the owner of the apartment building will want to be listed as an additionally insured entity.