RE: overhunting?
I think it depends a lot on the location and the circumstances.
If it's a location close to bedding or feeding areas, and you get busted or you might have spooked a deer or two on the way in or out, then it's definitely a good idea to leave the area alone for a while.
But say it's a good travel corridor, and it's pre-rut time, and you either didn't see any deer or snuck out mid-day. If you're diligent about scent control, then you probably have no reason not to hunt that stand the next day or even that evening.
I've been in stands two days in a row that on the first day were dead and the second day was hot with activity.