I wouldn't be so concerned with getting turned around as much as if the Trail goes onto a logging or tote road for a distance and you become so engrossed in thought on a nice road that you miss the turn off completely. Usually you will know within a few hundred meters, as thoughts usually always turn back to looking for that white blaze.
One thing I have discovered is that if you don't see a blaze on a tree in front of you and you think you got off the trail, turn around - If you are still on the trail, you will usually at least see a blaze on a tree behind you.