Periodically I ask questions like these: 

Am I better today than I was one year ago?  Which positive character traits have deepened / improved?  What destructive thoughts /  behaviors / habits have been replaced by productive ones?  What books have been read?  What contributions have been made to the lives of others?  Is my personal growth definable, and observable to others? 

My goal is to make some progress in the process as the days unfold.