Just like a boxer with his fists, try to have your principles ready at all times.
Spotter up in-depth tactical solutions: http://spotterup.com
The Little Book of Stoicism, by Jonas Salzgeber: https://www.amazon.com/dp/B07MY2VFQD?ref_=k4w_oembed_ty69xO9VG5giEd&tag=kpembed-20&linkCode=kpd
*** I don't know why I blanked on it, but Marcus Aurelius ruled from 161-180.