The exercise of writing these notes every day is in part an exercise in getting more in touch with what it is that is actually going on in my mind. An attempt to identify what it is my thoughts are milling around (over and above navigating the events of the day). That may seem trivial, but when it comes to putting thought-fields into words can sometimes turn out to require some degree of effort.
Attempting to draw something is a great way of getting to see aspects of it one would normally brush over. The same with thoughts and words.