Whether you are a firearms professional or just want to protect your family, always be aware and alert to what the aggressor is telling you, even when he isn’t aware that he is. You may see or experience many of the cues simultaneously.
For some time, I have either had to put up with a watch that ran slow, or use or make watch bands that separate the watch from my wrist. But with the invention of ABC watches (Altimeter, Barometer, Compass), I started taking a more serious look at digital watches. I didn’t like the watch function being digital any more than I ever had, but the other functionality definitely made up for it.