I think killer243 has a good point on this.
" believe the most important thing to have is comfidence in the stand you are sitting in."
If you have done your homework and are confident you have good stand placement, don't start second guessing yourself. You have to give things time to play out. Of course you also have to be careful not to over-hunt a stand and burn it out. It is a very fine line. I always try to have more than one stand setup in a particular area that I am hunting. It gives me more optins for wind and various weather conditions and even different times of the day. If I had to guess, I probably move a stand after 4 or 5 hunts if I find some place better but I won't move just for the sake of moving. Move the stand when the conditions, i.e. food supply, hunting pressure etc, warrant it.