Use this as a learning experience. I think I remember advising you that down averaging should be made worth it, and I myself only do so under certain conditions; one of them being that the stock is 20% lower than my original buy in price. Averaging down just because a $66 stock drops a buck isn't really helping, but averaging down your postion at $57 would help. Not all eggs in one basket also.
You can recover from this, I hope. Good luck blamokie!