Unless your art collection leans toward Salvador Dali, your preference is probably for paintings that hang straight. But if your pictures tend to tip every time a door slams, you may need the new EverStraight Hanging System (from $2, for a one-inch hanger that holds up to 10 pounds, to $4, for a seven-inch hanger that holds up to 75 pounds; www.everstraight.com).

Installation is easy: Screw the white plastic hanger to the back of a frame, nail or screw another to your wall (no level required), and hang the picture by interlocking the two pieces. If the frame has a hanging wire, mount the hanger to the wall, and place the wire in the groove on its top. The hanger's platform allows for maximum up-and-down and side-to-side adjustments, which is good for placing pictures within a grouping.