I took his post as "he doesnt want anyone to know he has a gun in public", hence the question of how people carry without giving it away. Maybe Im wrong, but thats how I read it. Either way, I carry a XD-9sc in a custom IWB kydex holster at about the 4 o'clock position. It is made where I can tuck in a shirt, and blouse it out and cover, or wear a un-tucked shirt and you never know its there. It has just a little fbi cant to it, and is easily reached.
However you carry, practice a lot on pulling from where you will wear it, it will do no good if you fumble while needing it in a shtf moment because you haven't practiced with it. Good luck.