ugh well, my 'essential kit' is rediculous. back when i was just a student, i'd have the biggest bag alive. it was one of those century vinyl large bags...it was disgusting. i had fighting gear in it, tonfas, sias, foam chuks. then i had paperwork in the sides like fliars. change of clothes. anything you can imagine. now that im an instructor, and just don't care that much about having everything in the world in my bag, i just carry my briefcase with all my paperwork and about a dozen rubber throwing stars in it, and a change of clothes and thats it.