Emergency Sub plan kits! A whole day's worth of plans based around a book. What a genius idea! Now I don't have to drag myself to work sick! (So, I teach middle-school math, but a lot of my friends teach elementary school. This is for them!
Sub Tub -- Possible things to include: A Welcome Binder (explaining the daily schedule, where things are in the room and anything the sub might need like computer log-in codes), emergency lesson ideas, great books, games and other activities to do!