The Anapanasati Sutta, one of the Buddha's core teachings, provides detailed guidance on mindfulness of breathing as a path to awakening.
How to Practice
Find a comfortable seated position
Sit on a chair or cushion with your back upright but relaxed. Rest your hands naturally. Close your eyes or soften your gaze.
Bring attention to your breath
Notice the natural rhythm of breathing. Feel the air entering and leaving. Do not try to change it — just observe.
When your mind wanders, gently return
Your mind will wander. This is not failure — it is the practice. Each time you notice and return, you strengthen attention.
Sit for a few more breaths before finishing
Before opening your eyes, take three slow, deliberate breaths. Notice how you feel compared to when you sat down.