“A comfortable asana (a pose of sitting or posture) of keeping the head, neck and trunk straight and steady is a must for meditation. Without the ability to sit in such a steady posture for prolonged periods, meditation cannot be practiced.
“Meditation should be practiced being alert, without being drowsy, shutting the eyes comfortably and without turning the eyeballs or pressing them in any way.
“The practice of meditation should be an essential part of the practitioner’s daily routine. The preferred time of meditation is Brahmamuhurta ([Hour of God: Brahma-mu-hurta, or Amrit Veela: Hour of Elixir]: very early in the morning: 3:00 A.M.). Likewise one should meditate at mid-morning and then again in the evening time. While falling asleep, one should also engage his mind in meditation.”
(Maharshi Mehi, Philosophy of Liberation)