How can I STOP hanging pieces? As hard as I try to not "give away" pieces in a game by checking the square that I am moving to first, paying special attention to the "long range" pieces of my opponent, and calculating exchanges, I can't seem to stop blowing a won game by hanging a piece or two. Bishops seem to give me the most trouble as they just seem to blend in the background late in the game for me, and then just snap off a piece of mine as I think I'm close to giving checkmate. Especially late in the game I just seem to get "tunnel vision" with what I'm doing and the lapse in concentration costs me a piece and the game. Will power doesn't seem to be doing it for me, so what else can I do to stop hanging pieces??
You speak the language of my people.

There's nothing magical, unfortunately.  You must avoid 'target fixation'.  That is, even if you're close to delivering mate, you have to stop before every move, and look at every piece your opponent has. Every time.  And you must remember that your opponent is choosing moves for a reason. One of those reasons is to snap your pieces off the board.

So the other thing you can do is to be cognizant of basic tactics such as pins, forks, x-rays, etc.  You can work on these by running a tactics trainer.