Fantastic to see Stoicism getting some attention, I've been applying it for a while and it has hugely improved my mental health and outlook. Stoicism is the most practically useful philosophy I have encountered, and I have dabbled in many.
This cheatsheet is great, and I can personally recommend negative visualization. It has removed a lot of anxiety in my life.
"What happens when you lose, everything / you just start again / you start all over again"