I do too. So much seems to go into the before time of an event. I had a restaurant 2 hour gig last night. Earlier in the day, I had to break all my stuff out. Make sure it was clean and pack what I thought I would need. I also needed to switch a few pictures on my board. Then load my stuff. All of this before I even ironed my outfit or got myself ready. I don't know about everyone else, but I find I need a lot of prep time.
I just re-read your post Alison. I think I misinterpreted it, now I think you meant you need to mentally gear up? Oops!
