I love all these ideas. Mine are:
a rugged pen (mine's hardware cloth over HUGE old aquarium frames) leading straight into the coop, in case you don't feel up to opening and shutting coop doors every day;
a section of clear rippled plastic roofing (on the roof), so the hens get enough winter sunlight (it's late December and mine are still laying about an egg a day);
a "real" metal hanging chicken feeder, hung INSIDE the coop (I was losing SO MUCH food to sloppy chickens and rain, before);
a mounted waterer inside the coop (I'm using an old piglet waterer, but it's fantastic--NO POO IN THE WATER!! Hurray!!);
a couple of mountable, small petfood holders in the pen, like you'd use in a pet crate, one with oyster shell (for the girls, for grit that includes calcium) and one with limestone grit (for the boys, who need grit but not calcium), like this:
http://www.petco.com/product/112528/Petco-Dog-Crate-and-Kennel-Cup.aspx?cm_mmc=CSEMGooglebase-_-Dog-_-Petco-_-1283090&mr:trackingCode=496F1204-6686-DF11-BC8B-0019B9C043EB&mr:referralID=NA.
Last of all, my coop is 6 inches off the ground to deter rats and mice from settling in underneath it, and has a "flounce" of black garden netting stapled around the bottom, as BYC friends say this deters snakes.
I used the ideas here in my coop, and guess what? The nest boxes are being roosted in (never mind a perfectly fine roost right there beside them), the drop-down door to the nest boxes thus has become my clean-out spot, and the "girls" are laying their eggs in nests they've made in the cubbyhole underneath the next boxes, on the floor of the coop. I duct-taped a plastic measuring cup to a slightly curved branch to use as an egg-retriever.