Great post!  I think it's interesting that, as a teacher, I am constantly thinking about my purpose for doing things.  It's more clear cut; I should do this because the kids need to get from point a to point b and this is how I'm going to make that happen.  But in the rest of my life, it's not so clear cut.  We often do things because we usually do them, not because we thought about why we are doing it and decided it was the best thing to do.  Just taking a moment to pause and think about the usuallys and shoulds could make a big difference!  Thanks for the reminder.