While this may seem like just another thing that’s added to your plate, get copies made of all of the keys before you move. In all of the chaos of the move it would be easy to lose a key, and that is the last thing you want to deal with on your moving day.
If you aren't going to bring any of your furniture with you then try to put them up for sale or donate them.
Research what internet and cable companies are in your new city or state before you move. It will help to know which service you want in your new apartment before you move.