Disconnect any appliances and electronics such as your washer, dryer, tv’s, etc. you can.
Having boxes packed, ready, and in an easily accessible area such as your garage, can greatly improve moving times.
If snow is present, make sure the driveway,sidewalks and walkways are de-iced and snow has been removed. Furthermore, it’s good to have a mat so the movers can wipe their feet as they come and go.