Anapanasati, mindfulness of breathing, is a core meditation practice in Theravada, Tiantai and Chan traditions of Buddhism as well as a part of many mindfulness programs. In both ancient and modern times, anapanasati by itself is likely the most widely used Buddhist method for contemplating bodily phenomena.

Kadampa Buddhism is a Mahayana Buddhist school founded by the great Indian Buddhist Master Atisha (AD 982–1054)... The great Kadampa Teachers are famous not only for being great scholars but also for being spiritual practitioners of immense purity and sincerity.

The basic instructions for serenity meditation are to choose an object of attention, put aside distractions, focus and allow attention to become fully immersed or absorbed in that object.

Just breathe normally and pay attention to your breathing process, one breath at a time. Keep your awareness focused but be gentle; you should have an attitude of discovering and making friends with yourself. Acknowledge the thoughts that pop into your mind without engaging them. Simply observe them and let go.