This paper argues that Heidegger's phenomenology of boredom in The Fundamental Concepts of Metaphysics: World, Finitude, Solitude (1983) could be a promising addition to the "toolbox' of scientists investigating conscious experience. We describe Heidegger's methodological principles and show how he applies these in describing three forms of boredom. Each form is shown to have two structural moments – being held in limbo and being left empty – as well as a characteristic relation to passing the time. In our conclusion, we suggest specific ways in which Heidegger's phenomenological description can be used in scientific investigations of boredom.