Oh, and hooks! You'll want hooks in there! Either pound some long nails in partway or get some kind of tool hooks. Invaluable for keeping stuff handy, like a rake or fork for turning litter or the poop scoop if you use sand. I also keep a wide blade putty knife in there on a hook for...
I will most whole-heartedly agree with not restricting yourself to a run squared with the coop. Because we were space limited, and the only place to put our setup would have put a straight-from-the-coop run smack dab over Ken's prize apricot tree, we had to think outside the box a bit. So we...