When I was younger, I always wore a big, heavy jacket. No matter what the weather, I always wore it. I guess I like the comfort and the pressure, but I also think it gave me the sense of familiarity. I still do that to this day, I alway wear a jacket, sometimes not as heavy, but I still wear one.
I also do not go out of the house without: Flash drives (I have 5 of them) My favorite deck of cards (An Ellusionist Masters deck with UV 500 Airflow finish, and a custom made steel card case) my keys, a pencil/pen.
Although I do not need to wear my glasses when reading, I still do. The first thing I do in the morning is put my glasses on, and they stay on my face until I go to bed.
Whenever I leave my seat in class, I always take my backpack (I have horrible memories of people vandalizing my stuff and kicking my backpack and even throwing it away)
I am sure other people with AS are like this too.