When you notice that you are thinking, go back to the breath. You don't go back to the breath so that you can meditate, going back to the breath is meditating.

When you notice that you are thinking, go back to the breath. You don't go back to the breath so that you can meditate, going back to the breath is meditating. It can happen dozens, even hundreds of times during a session. That's the point, in as much as there is a point.