[nick_urban]

Meditation. Being able to direct your attention, to be present in difficult situations, to care about others when it's easier to worry about oneself, and to be willing to see truths that contradict one's self-image. There is much to be gained from this simple practice, and much to be lost from foregoing it.

"the faculty of voluntarily bringing back a wandering attention over and over again is the very root of judgment, character, and will. [...] An education which should improve this faculty would be the education par excellence." - William James

[trevyn]

Note also that you can train these useful skills in ways other than extended courses of formal sitting meditation. (Which also often come with a lot of woo attached.)

[mdsharpe]

https://wakingup.com/ and https://www.headspace.com/ are both woo-free choices I'd recommend.