After you pass someone on the trail, don't look back. It implies you distrust him. Don't ride another man's horse. Never shoot an unarmed man. Never shoot a woman at all.
Real cowboys are modest.
A horse thief may be hung peremptorily. Never try on another man's cowboy hat. Cuss all you want, but only around men, horses and cows. The best cure for insomnia is a Monday morning. Right now I am having amnesia and deja vu at the same time.