
A Harvard study found that 47% of waking hours are spent thinking about something other than what is actually happening — and that this is the single strongest predictor of unhappiness
Epictetus — a former slave who had been tortured and exiled — figured out why this happens and how to stop it in 50 AD. His framework became the foundation of CBT, the most evidence-backed psychological treatment in the world.
Three steps. Two thousand years old. Still works.
Hopefully this helps :)