Mindfulness is something I practice in everyday life as part of my recovery from alcoholism ... when I find myself with a bad flow of emotions, I start observing the flow, chase it upstream until I find the problem, and then address it so that my day doesn't go to shit and trigger a drinking urge.
I don't formally meditate, but often playing my guitar induces a similar mental state.
I don't formally meditate, but often playing my guitar induces a similar mental state.