For white-tails I've always hunted from trees except 2 blind sits in Texas in 2006.
When I first started in 1970 at age 16 I was under the impression that zero movement was the goal. So, I moved very little, painfully slow. I remember moving my eyes to the side then follow with my head, then eyes, it was torture! I killed some deer -- more than many of the adults I knew.
These days I move more. The slow move is no fun and I have to remind myself that deer hunting is supposed to be fun (for me at least). So, I move more but still slowly and with stealth. If my hand is ungloved I move it up against my body. I like to wear a very thin camo skin over my head but not over my eyes or nose.
I hang the bow within easy reach until it starts to get light (I like to be on stand at least 30 minutes before shooting light). Then I will hold the bow for the next 30-45 minutes. However, movement with the bow in hand is a bit more exaggerated so leaving it hunt is ok.
Like the others I'm intent on seeing or hearing the deer before it is in bow range. I have visualized every possible location a deer might come from and I know where my windows are.
I have only very rarely (knowingly) spooked a deer while on stand. But like the poster above wrote, I'm sure there have been some that have spied me without me knowing it.
I will stand if I'm sitting if I can do so without drawing the deer's attention. If I can't stand I have no qualms about shooting sitting down. Heck, most of the time I couldn't tell you if I had been standing or sitting when I took the shot!
I only draw when the deer is looking somewhere except towards me. I always pick my stands with cover in mind. I'd rather tie back limbs than cut them if possible. This way I can restore some of the cover as leaf-fall occurs. I tend to make less open windows than I used too. I also hunt 4-5 feet lower than when I was younger -- 15' rather than 20'-- easier shot angle.
The most difficult thing for me is not to turn my head to look behind me when I think a deer is walking. It drives me crazy not too know what it is. I have mildly spooked (losing the shot sometimes) deer by being impatient this way.