Love or hate her, you have to admit the notoriously fiery trainer on NBC's The Biggest Loser gets results. And while she's softened up her image—becoming a mom of two adorable kids will do that to a girl—she's still all about helping people find what works for them. Jillian Michaels' tips on Twitter and workouts on Pinterest are great, but her free weekly podcast where she takes calls, gives advice, and is generally all-around hilarious are a goldmine for motivation! For instance, recent shows covered how to "cancer-proof" your home and everything you need to know about cardio. Listen to it on the treadmill and it's like having America's favorite trainer right there with you—but with 97 percent less yelling.
Why you'll love her: “A bad day for your ego is a great day for your soul!” See? Permission to fail (and learn from it)!