Take photographs of all of your valuable possessions with any serial numbers as well.
Research what internet providers are in your new state or city before you move. It will help to know what service you want in your new home before you move.
While this may seem like just another thing that’s added to your plate, get copies made of all of the keys prior to you move. In all of the chaos of the move it would be easy to misplace a key, and that is the last thing you want to deal with on your moving day.