Another point we have also made before is that it is best to conclude the practice session when our meditation is proceeding well. This is the case whether we are training in emptiness or impermanence.

Why is that? Should we not try to abide as much as possible in a relatively good state? If we stop when the meditation is going well, it will actually have a positive effect on the next session. We will retain an enthusiasm for the practice, have expectations of possibly repeating the experience, and look forward to starting the practice again.

- Quote from The Four Seals of Dhama, "The Importance of Practice"