Paul,
Reflection is a powerful tool for instructors. The biggest help for me is watching improvements over time. I would normally not be able to keep track of the numerous, day-to-day observations, comments, needs, assessments, etc. that I make about the effectiveness of a class. The journal helps do that for me. Also, when it comes time for annual evaluations, this can help me recall special events or memories that contribute to my evaluation.
Barry Westling