During meditation we treat all thoughts as if they are of equal value. We try to be aware of them when they come up and then we intentionally return to the breath as the major focus of observation, regardless of the content of the thought! In other words we intentionally practice letting go of each thought that attracts our attention, whether it seems important or insightful or unimportant and trivial. We just observe them as thoughts, as discrete events which appear in the field of our awareness.
Jon Kabat Zinn, Full Catastrophe Living