I file all articles, exams etc. alphabetically by title under the professor's name. If we have multiple courses we file all courses together in one alphabet and if several professors have the same or similar last name we file all their articles together under one alpahbet. The articles are stapled into folders and I have my students color code the folders to make it easier to find mishelved items. We have used this basic system for over twenty years. Any way no matter how you shelve them, they will be mis-shelved at some point, usually when you need them most.
Books are usually mis-sheved under a subtitle or sometimes an author.
I usually type labels or tape little arrows on the spine when I think it will be difficult to shelve. The Reserve List shows all the items for one course, books, articles, and or electronic reserve. The student employees soon learn to read the screen and find the items. It took a little longer with electronic Reserve because it was new and we changed the way it was listed several times. The patron also gets a bit confused because we list our electronic reserve with regular reserve items, they try to get the regular Reserve items electronically too.