Mindfulness, despite the recent buzzword-iness of it, has been an amazing tool for me. When I'm feeling any number of negative emotions (anger, anxiety, stress, etc.), or when my OCD flares up, it helps so much to simply pause, turn and face the emotion, address it, and say to myself "I am feeling this way because..." and calling out the trigger. It almost takes the teeth out of the negative feeling, making it pass a lot sooner.

Sounds a little hippy-dippy, sure, but for me it falls into the "it just works" bucket.