"Lamps on either side of the couch or bed should match," says Christy Ferer, Vidicom CEO.
If you want a motel-room look, stick to this rule. Otherwise, use lamps that you love, whether they match or not. They don't have to be the same height, same style, or same period, and the shades can be entirely different, too.
A lamp or light source is where you find one. Make a lamp from an alabaster urn, a large conch shell, an earthenware jug, old pillars, vases, a perfume bottle, an old teapot, or a sugar bowl. A large glass funnel turned upside down makes a great hanging fixture.