Good idea for a student teacher! Teacher's survival kit: Animal cookies for when your classroom seems like a zoo. Band Aids for when things get a little rough. Chewing Gum to help you stick to it. Crayons to color your day bright and cheerful, and more.
Rehearsal Dinner "Packets" -- Bride/groom madlibs, wedding schedule for everyone, list of phone numbers the wedding party might need the day of, etc. - I especially like the list of phone numbers idea!