I've always been in the mind set that there are 2 things a hunter could always do a little bit more of; practice and scouting.

Now I'll agree that if you've hunted the same area for 15-20 years you probably don't have to do very much scouting at all but an occasional walk in the woods could help for a few reasons; 1. Changes could happen. Weeds or a bug infestation could ruin a regular food supply, trees you've put stands in could get struck by lighting and fall, etc.... 2. Poachers. If you're not on your property you may have no idea that poachers are taking your game. 3. Transient deer. The vast majority of deer stick to their regular territory but some deer don't. In my opinion those deer that don't tend to be better and consider all territory theirs. They don't come by very often but when they do you WILL want to know their patterns. 4. You could always discover something new.