1. Gather a collection of similarly sized art.
Choose pieces that have a common thread, such as color palette or content. "Your wall should say something personal, so hang things that reflect your interests," advises Phoebe.
2. Keep frames consistent in finish and feel.
"But they don't have to match exactly," says Phoebe. Because a stairwell is a high-traffic area, be sure to choose frames with slim profiles.
3. Lay out everything on the floor.
It's easier to do your measuring and editing there. "Hanging pieces in columns makes the display feel organized, but don't worry about it all being perfectly aligned," she says.
4. Use proper hanging materials.
Instead of one hook in the middle, use two small nails with good hooks on each picture so it won't move. Rubber bumpers will help keep the frames securely in place.