What do you do when the whole family leaves the house?

you could be a spouse, an S.O. or even a responsible, legal young adult. the whole family leaves town for a reunion or funeral or even a vacation or whatever, but THEY ARE GONE for a significant amount of time.

for some reason, you didn’t go and you have the house to yourself. do you make good use of the time? do you do what you always wanted to do only if you were by yourself to do it?