The only advise I have is to choose your shots a little more wisely. Don't try and make miraculous shots. Keep within your limitations. If the shot isn't there don't force it....ever.

Now on the other hand if anyone hunts lone enough they will make a bad shot due to nerves, equipment problems, unseen obstacles, etc...but you should never make a bad shot on a deer because of a bad angle. If the deer doesn't give you the proper angle then just except it and hope for another chance on another hunt.

Glad things worked out for you.