I'm facing the door (normally open), and not facing the window (which overlooks the Rockies). When I faced the window, I found I didn't look at the monitor, so facing away at least lets me get work done. I have 2 bookcases, one full, the other one getting there. I leave the shades open until about 1pm when I close them because the direct sunlight makes everything unreadable. There are 3 chairs, a whiteboard and another desk (which is unoccupied, and with a hiring freeze is very unlikely to ever get occupied).
Because of a bad experience getting laid off at a previous job (if I hadn't tailgated someone else in, I never would have been able to get my personal books and stuff), I normally don't keep more posessions at the office than I can carry out by myself (meaning no aquarium, or other bulky stuffs), and just books.