More Connecticut doctors, therapists and psychologists are turning to the practice of mindfulness to help treat depression, anxiety, chronic pain and even addiction. The practice — which cultivates an awareness of the present moment and an acceptance of the feelings and emotions that come with it — has reached the mainstream and is being adopted by new fields. Veterans groups are using mindfulness and yoga as a healing tool. Teachers in some Connecticut elementary schools have incorporated it into their classrooms to help students focus. And universities are offering mindfulness training to help students deal with stress.