Bedroom "Artwork"

In our new apartment, we have a TON of wall space. And, I don't like feeling like I live in a "crappy" place (the apartments we live in are definately NOT crap). But we don't exactly have the money to spend on a ton of decorating. So... I'm trying to come up with simple, relitively inexpenseive things I can do to make our apartment feel like home, and it doesn't hurt if its pretty too. So here is my attempt at being creative!