Psychological techniques to practice Stoicism
The problems with Cynicism, Scepticism, Epicureanism and Stoicism is that they don't really adhear to the notion of 'everything in moderation'.  The logical extremes either can lead to some genuinely useless approaches to life.If one should never worry about things that they cannot possibly control, even if it directly affects one's life, because we are just going to cease to exist at some point anyway, how would one now whether or not they could alter it, if they never began worrying?  This very idea lead to several prominent Stoics to commit suicide, because might as well hasten my eventual ceasing of being?Perhaps if they had concerned themselves with things that on the surface seemed outside of their reach, they might have realised that some things are approachable, even if the solution is not obvious.The idea that one should avoid worry about things outside one's control is not a bad suggestion in general, it just should not be taken as an extreme.  I mean, there is probably a reason why philosophers went back to Aristotle and Plato after those other four Schools saw prominence.Jewish, Christian and Islamic philosophers weren't trying to make their religions compatible with Zeno's or Epicurus' teachings, but rather Plato's and later Aristotle's.