Keep the weight off by Amy Spencer

After two seasons away from The Biggest Loser—during which time she became mom to a girl, Lukensia, and boy, Phoenix—Jillian Michaels is back. She's not exactly a kinder, gentler Jillian, but motherhood has made it easier for her to relate to women's slim-down woes.

"The only time I put on weight recently was with the kids," she says. Her trick for losing it? Real-life, simple tactics: "I've become the master of shortcuts! It's still about eating less and moving more, but there's a way to do it so you don't feel miserable." This way, the weight stays off. Here are her top tips.