If I didn't have a calendar with dates marked down I assure you I wouldn't go to doctor's appointments or volunteer meetings. Yet, if I book up too much of my day, I will be a no show somewhere in part or all of the day. Without a calendar, I sit around and my anxiety gets worse as I slowly become a troll. If my calendar gets too overwhelming, the anxiety will also shut me down. Sometimes, my anxiety still messes with me, but this technique has helped me greatly.
Now you know. Today, I did the dentist, the doctor and then de nada. All in a days work.