Two weeks out, confirm your moving date and book elevator or loading dock time at both buildings. In Arlington, Reston, and DC high-rises, those slots fill up fast around month-end, and some buildings need a certificate of insurance from your mover.
Ten days out, start packing the rooms you use least: guest rooms, storage closets, the basement. Label every box with the room it's going to, not just what's inside. It makes unloading twice as fast.
One week out, schedule utility and internet transfers, and decide what isn't coming with you. Anything you won't use in the new place is cheaper to donate or haul away now than to move.
The day before, empty and defrost the fridge, take apart anything you're comfortable disassembling, and set aside a bag with chargers, medications, documents, and a change of clothes. On moving day, your only job is to point us to the right rooms.