Sleep is absolutely one of the most important activities of this endeavor.  You might have a general idea of how much sleep you got and its quality on any given night, but you will have no idea how much you got a week ago.  Further, you won’t be able to spot trends or see associations sleep has on other activities.  Tracking my sleep data enabled me to discover a correlation between my sleep quantity and quality and how long I can hold my breath.

Below is a spreadsheet containing all of my sleep related data.  It contains the following categories:

Date, Minutes Slept, Minutes Awake, Number of Awakenings, and Time in Bed