As a trainer on The Biggest Loser and a New York Times best-selling author, Jillian Michaels is known for her tough love. Through her personal website, JillianMichaels.com, she pipes her digital personal-training expertise to all of her subscribers with challenges, tools, and daily inspiration. Every subscriber is guided by a personalized fitness plan built on a foundation of daily exercises to help make their goals realities. JillianMichaels.com is loaded with more than a dozen tools to aid in the journey to better health, including a meal planner, eating-out guide, and workout playlists. A mobile app makes it easier for trainees to track their fitness when they’re on the go or stranded on a deserted island.