I love thrift stores, yard sales, online yard sales (does your area have cool Facebook yard sale pages too?), and the ReStore. If you aren't familiar with the ReStore, it's a place for donations of building material, furniture and household things. Every so often I'll browse around, and usually walk out of there with something in hand.
I found a tall cabinet door (approximately 3' tall) for just $5. It was already painted off-white.
So, I snazzed it up a bit... painted the inside area with chalkboard paint, "distressed" the edges with Distress Ink, and then used a white chalk pen to write the lyrics to one of our favorite church songs.
It was fun to make... and so easy!