Gallery Wall! LOVE! This website also has great design templates! Start with hanging up paper on the all that is the same size as your picture frames. This way you can experiment with different layouts and see what you like best.
Glass frames from Ikea to create a gallery wall. Great idea! Put in photos, switch to art prints, then later switch to bold, graphic scrapbook papers. Lots of versatility with the arrangement of glass frames, but low expense to change the look!