It’s horrendously hard isn’t it?
I have a typical week timetabled at the front of my diary/planner that I can refer to when I’m making appointments so that I don’t get flustered and pick a bad time. I never take appointments on a Monday if I can help it.
When I’m scheduling my week I add in extra time - commuting obviously, sometimes extra time to get ready if I need to dress or make up differently.
I add in a recovery time if I think I’m going to need it. This is one of my best tactics. If I don’t need it I’ll just crack on with my day obviously, but when I do, I don’t have the added pressure of things piling up.
Sometimes I’ll also mark out anticipation time if something is likely to stress me, so I know not to schedule tasks that require concentration, or are energy drains themselves.
Since I started paying attention to this I’ve become much more aware of myself. Now I know that a visit to the hairdresser wears me out, and isn’t particularly pleasant and it actually helps to free myself from any expectations that it’s going to be enjoyable.
If possible I’ll use providers where I can book and change an appointment online. But with the hairdresser and dentist I get the next appointment in the book before I leave because then it’s easier to go than ring up and reschedule.
Sometimes I’ll ask dh for help, to make calls, or for a little accountability to go.