Try these directions for mindfulness of breathing, a basic concentration practice: When you’re ready to meditate, close your eyes and bring your attention to the motion of your breath as it enters and leaves your nostrils. Keep your focus at the nostrils, noting the full passage of each in-breath and out-breath from beginning to end. Don’t follow the breath into your lungs or out into the air; just watch its flow in and out of the nostrils. If you can, notice the subtle sensations of the breath as it comes and goes. Be aware of each in-breath and out-breath as it passes by the nostrils, just as the doorman watches each person who comes and goes through a door.