Emails: for random thoughts/feelings, questions, advice (but it needs to be as clear and concise as possible.)
Texts: for when I need reassurance
Phone call: for emergencies

I can email or call for scheduling.

I try to limit my emails to Tues night, Wed, and Thurs (I see her on Tues, it's her weekend Fri, Sat, Sun, and there's not much of a point to email on Mon).