After you have been introduced to the nature of the mind, i.e. after you have encountered your own intrinsic awareness as it is and you have ascertained the view of the Great Perfection, then maintaining the view over a period of months and years is the meditation.

Meditation is only the maintenance of the view indefinitely, for a very long time. This is done in formal sessions which always begin with guru yoga practice.

At the point where one's mind and the guru's mind become one taste, one enters into the dzogchen practice of equipoise.

When one concludes the session and goes on to the post meditational experience, arising experience, i.e. in between the formal dzogchen sitting sessions, one should consider the Four Thoughts That Turn the Mind, contemplate the Four Thoughts, as well as perform other practices that one is doing on a daily basis.

By maintaining this type of practice of dzogchen meditation over an extended period of time, it becomes the increasing experience of the vision of the dharmata.

-- Yangthang Rinpoche