See Hear Feel
Pay attention to the difference between seeing, hearing, and feeling. You may see something, such as a tree out your window or an image of a tree in your mind. You may hear something, such as a bird in the tree, or talk in your mind. You may feel something, such as the floor under your feet, or an emotion in your body.
To do this technique, let anything arise in your awareness and determine if the experience is "See," "Hear," or "Feel." Pay attention to just that for a second or two, drop it, and let the same thing or something else arise in your awareness. Repeat this 3-to-5 second cycle for at least ten minutes, allowing each experience to arise and pass away freely.