When thoughts come we should be aware, mindful that thoughts are coming, and make friends with them, not to have a conflict, and then come back to the breath. But we can be aware of the breath for a few minutes, then again thoughts will come. This is the nature of the mind, that we don’t have much control. So meditation is understanding how our minds work, making friends with our mind and whatever is happening, and training ourselves to slowly, gently come back to the breath.
It is very important even when we are not sitting to continue to be aware and mindful of the thoughts that we are having. Even while relaxing, while eating, we are having thoughts. So whatever we are doing it’s a very good practice to be conscious of our thoughts, not only when we are meditating. We can learn a great deal about our thoughts by just watching them, just asking: What are the thoughts that I’m having?