Kristin Cavallari's Must Haves: From a Luxe Espresso Machine to Rao's Marinara Sauce

Cavallari loves putting a few drops of the Young Living Lavender Essential Oil ($27, originally $36) on her pillow and feet right before bed. "I've been doing it for years. I sleep like a baby when I do it. I love it," she says. She adores the "nice and easy" scent lavender exudes, saying, "It just kind of relaxes you immediately."

Pro Tip: Lavender oil isn't just for nighttime. "If you're just having like a stressful day where you just need to take a minute, then this would be a good one to grab," Cavallari says.