Roundup: 26 Free Printables for Gallery Walls and resources for lots more
Spray paint a canvas gold, tape down a design, then paint with another color. Cute and easy.
Glue wooden letters onto a canvas and spray paint.
Cheap and Easy DIY Wall Art | Printable Gallery Wall by DIY Ready at http://diyready.com/diy-wall-art-you-can-make-in-under-an-hour/
Vibrant Button Tree on Canvas