Personally, unless I'm at a range or on a firing line, I usually don't open carry. (There have been rare exceptions like when I've removed a jacket while sitting inside a stuffy restaurant, or while I'm out of the vehicle pumping gas at a late night station.)
I'm reminded of Lance Thomas who is, perhaps, the most: celebrated, skillful, and just plain lucky CQB pistol gunfighter in modern times! One of jeweler/gunfighter Thomas' self-defense techniques against sudden attack was to, 'salt' numerous pistols away behind the counter of his jewelry store. During his gunfighting years, Thomas might not have appeared to be armed; but he continued to survive multiple attempts on his life by never being too far away from a hidden, but readily available, pistol.
LiveLeak.com - Lance Thomas track record; 4 robberies 5 kills