A practice of feeling gratitude is extremely beneficial in that regard. Simple meditative practices help one become aware of thoughts and feelings more quickly, before they are fed through rumination, making the down-spiral cycle easier to disrupt.
And, sometimes, I rant. This usually veers quickly into comedic territory and I’m reminded of the ridiculousness of taking human life too seriously, given the absurdity of being primates in pants who love shiny things. (It would be unimaginable if human life weren’t absurd.)
Tiger Riding for Beginners 