Experience hunters know how important it is to make a setup well before hunting season and then to let it alone until opening day. If you know the deer frequent that area and will continue to do so from scouting time through the start of the season, that's great advice. One thing hunters often overlook, however, is that the setup itself might change over time, and even throughout each day.
For example, how many times have you gone out scouting in a morning or evening, picked out a great spot and cut shooting lanes. Then when you finally arrive to hunt, the sun, which wasn't a factor when you made the setup, is now shining directly in your face.
Test your setup at all the times of the day you intend to hunt it. The time to find out you need to make adjustments is not when you have a bow or gun in your hand. Lastly, if you live in an area of the country that will see a heavy leaf drop during hunting season, take that into consideration when selecting a setup. Leaves you had been counting on to break up your outline might be gone in a surprisingly short amount of time.