To practice 4-7-8 Breathing, follow these steps: 1. Sit or lie down in a comfortable position. 2. Close your eyes and take a deep breath in through your nose for 4 seconds. 3. Hold your breath for 7 seconds. 4. Exhale completely through your mouth for 8 seconds. 5. Repeat the cycle 3-4 times, or until you feel more relaxed.