Whenever you have a bad day, feel exasperated, or struggle to get out of a foul mood, sniff some lavender to restore your serenity. It’s easy to see why lavender is one of the most popular scents in aromatherapy. (Scents like citrus, rose, and sandalwood are also pleasant. When you smell them, they can trigger particular memories or experiences because your olfactory nerve carries their scent straight to your brain.) There are many ways to enjoy lavender: use freshly crushed flowers set out in a bowl, set some reeds in a diffuser pot with a splash of lavender essential oil, light some lavender-scented candles, simmer lavender potpourri, or put out sachets of dried lavender. Allow the scent to lift your mood and remember that you never again have to relive a bad day.