After that, I would do just like everyone else has said - rekey your new home. Nobody knows who might have a key and the peace of mind is worth the cost.
Many new Owners tear their hair out wondering where all the keys are -- change the locks BEFORE you put anything in the house.
- Before the welcome mat
- Before the groceries, cleaners and chore clothes
- Before the spare car, the packed boxes and your pets.
BEFORE you leave your loan papers with all your personal information in the kitchen while you go to lunch.
After that, perhaps turning on the utilities in your name and re-keying or changing all the door locks, repainting / remodeling if needed, and move your stuff in. Complete a change of address form @ USPS.com. Go say Hi to the neighbors, invite your friends over...through a party. Then go buy another house because they are on sale at incredible prices and rates and tell everyone you know to do the same.
Those are just a few of my suggestions that come to mind off the cuff.
Congratulations on your purchase!