I just text and/or email for schedule changes... only other times I write my T for something different (if she's not emailing me first) is if I'm going through something really big and she ask me to email her for the outcome immediately- and it's happened maybe twice in two years.

She said to me that I could have call her other specific, tough moments if I felt like I needed to, but I never ever took the chance... mostly cause I would feel a little embarassed (and invadent, but it's really just me and my particular story!) in calling her, and secondary cause I feel better in use our "live" hour of therapy .