Mindfulness: More Than Just a New Technique
I like to describe mindfulness as a threefold attentional skill set: concentration power, sensory clarity, and equanimity working together.
Shinzen Young • The Science of Enlightenment: How Meditation Works
Mindfulness is a great tool for practising the observation of your thoughts and strengthening that mental muscle that allows you to notice a thought and choose not to stick to it, but to let it pass, making a deliberate choice about where to focus your attention.