Sit comfortably on a chair or meditation cushion in a straight posture. Imagine that a string is attached from your head to the ceiling, lengthening your spine. Close your eyes and breathe naturally, focusing on the breath as it enters and exits your lungs. As you observe the breath, note the rising and falling sensations of your belly; try to follow the cycle of the breath, inhalation, exhalation, back to inhalation. Don't try to control the speed of your breathing. This is simply an observation exercise. Distracting thoughts will come into your head but simply acknowledge them, without judgment, and bring your attention back to your breathing. Continue the practice for 20 minutes to get the full effects of the meditation.