Before you begin, set aside 10 to 15 minutes in a quiet space where you will not be interrupted. Silence your phone and close your door if possible.

1. 1
   Sit or lie down in a comfortable position. Uncross your arms and legs and let your hands rest naturally.
2. 2
   Close your eyes gently or soften your gaze toward the floor.
3. 3
   Take five slow, deep breaths. Inhale through your nose for four counts, hold briefly, and exhale through your mouth for six counts.

Picture yourself sitting beside a gently flowing stream on a warm day. Leaves drift along the surface of the water. Use all of your senses to build the scene: notice the color of the water, the sound it makes as it moves over stones, the feeling of the ground beneath you, and the warmth of sunlight on your skin. There is no rush. Spend a minute or two simply resting in this place.

As you rest by the stream, thoughts will inevitably arise. This is completely normal and expected. Each time a thought appears, follow these steps.

1. 1
   Notice the thought without judging it. Simply observe what your mind has produced. It might be a word, a sentence, an image, or a feeling.
2. 2
   Gently place the thought onto one of the leaves floating on the stream. You might imagine writing the thought on the leaf, or seeing the thought resting on the leaf's surface.
3. 3
   Watch the leaf carry the thought downstream. Follow it with your mind's eye until it drifts out of sight.
4. 4
   Return your attention to the stream and wait for the next thought to arise. Repeat the process each time.

It is normal to encounter difficulties during this exercise. Below are common challenges and how to handle them.

• If the stream stops flowing, you may be trying to force thoughts away. Remind yourself that the goal is observation, not elimination. Let the stream resume naturally.
• If you get swept into a thought and lose the visualization, that is perfectly fine. As soon as you notice, gently return to the streamside and place the thought on a leaf.
• If you feel frustrated or bored, place that feeling on a leaf too. Every mental event—pleasant, unpleasant, or neutral—gets the same treatment.
• If the same thought keeps returning, let it. Place it on a new leaf each time without attaching meaning to its persistence.

When your timer sounds or you feel ready to finish, let the visualization fade. Wiggle your fingers and toes, take a final deep breath, and open your eyes slowly. Take a moment to notice how you feel compared to when you started. You may wish to jot down any observations below.

Like any skill, cognitive defusion becomes more effective with repetition. Aim to practice three to five times per week. Many people find it helpful to anchor the exercise to an existing routine—for example, practicing immediately after waking or just before bed. Over weeks of consistent practice, you will likely notice that intrusive or distressing thoughts lose some of their grip, and you feel greater psychological flexibility in daily life.