I use a messenger bag (T2) w/a sleeve (also T2). For me, one shoulder works better than a backpack. Even so, I try to take only one casebook home at a time, becuase it does get heavy. I've also experimented with unbound books, which makes for a lot lighter load.unbound books, interesting idea. my friend cut his pages out of his casebooks and suggested i do that, but i dont know if i want to do that. but unbound is definitely something to look into.