Mindfulness is the ability to bring one's attention or awareness to bear on the current moment experience. There are a whole raft of techniques that help to achieve this, but usually they involve 'anchoring' one's current experience to an object such as the breath or parts of the body. I tend to teach mindfulness techniques as an aid to therapy, and can teach a range of strategies on request to individuals or in a group format.
With daily practice, mindfulness can help you achieve a sense of distance between oneself and the thoughts that appear in the mind. Over time, a sense of relative freedom can be achieved from negative, self-critical, worrisome, fearful and angry thoughts. With mindfulness you can develop a sense of mastery over your thoughts which will lead to the relief of psychological distress and therefore a greater sense of inner calm.
I have extensive training in a range of mindfulness-based therapy approaches, such as Acceptance Commitment Therapy (ACT) and Compassion-focused Therapy (CFT). I use mindfulness regularly in therapy. Mindfulness and meditation is particularly useful in helping to manage trauma-related symptoms such as flashback memories of a trauma event. As such, mindfulness can form an important part of one's recovery and ongoing 'tool kit' for maintaining progress after therapy.