I like to hunt different units, in fact over the last seven years, I hunted in six different units. (I don't know... must be my severe Attention Deficit Disorder!) Once the draw is complete and I know which unit I'm hunting.. (mid July), I'll do a couple of "camping" trips in that unit over the summer. My wife enjoys camping, so its funny how our camping trips always end up somewhere in my deer unit for the fall! As the season draws near I'll try to get out at least three or four additional weekends and have at least 3 different "spots" picked out in the unit.
Another thing I do is go out during the Oct season (if I have a Nov. or Dec. tag). Not to hike and glass so much as to check out the deer camps and BS with other deer hunters. I've picked up a lot of valuable iunformation this way.
