Pictures in high-traffic areas, such as halls and entryways, often end up askew. Remedy this with self-adhesive Velcro tabs in 1/4- or 1/2-inch sizes. Remove the backing from both sides of two tabs without separating the Velcro layers; stick one on each of the lower corners of the frame. Hang the picture level, pressing the base firmly against the wall.
Picture Hanging Hint
Martha Stewart Living, September 2005