Take something you really love, a letter, envelope, photograph, a ticket stub... anything - to a printing place like Kinkos and have them blow it up for you to hang as art. An old recipe from Grandma or Mama would be great for the kitchen.
Fabric attached to the wall with liquid starch. GREAT for apartments you can't paint. What a fabulous idea thinking how often you could change this out. Or use fabric on a head board with your favorite lyrics.