In recent years, there has been growing interest in bridging bodies of knowledge from introspective and contemplative traditions with modern neuroscience. By making the primary object of study an individual’s subjective experience, scientists are then confronted with the challenging problem of how to record a given mental state at a given point in time. For simple experiences, such as in facial recognition tasks, an external recording device such as a button box or computer keyboard is adequate. However, these devices pose (...) fundamental problems when attempting to record more subtle states of mind, or to do so in situations where the presence of an external input device would disturb the subject, such as in the case of studying the evolution of internal states of highly advanced meditators. Here, I suggest that variants of the mnemonic techniques used in memory competitions can be used to make measurements in experiments where an external device would be impractical to use, or would unnecessarily disturb the subject. Demographic and performance data from memory competitions suggest that these techniques can be learned by ordinary subjects participating in multi-session experiments, and that, for highly trained individuals, events can be recorded at roughly 400 millisecond intervals for timescales on the order of tens of seconds, and at roughly one-second intervals for sustained periods of one hour or longer. Finally, I discuss the relationship of the current proposal to descriptive experience sampling (DES) and the visualization techniques of the Tibetan meditative tradition. (shrink)