As multiple studies have shown, valerian is an effective sleep aid. "It helps with restlessness and eases nervous tension," Dr. Vuu told POPSUGAR. When using valerian in essential oil form, he recommends creating a "slumber-supporting linen spray." Combine 15 drops of a valerian essential oil into distilled water in an eight-ounce spray bottle, and apply it to your sheets for a restful night of sleep.