Oprah Winfrey is the most successful woman in the world, but as she told her millions of viewers on yesterday's show, "it doesn't mean anything if you can't control your eating [and] fit into your clothes ... I can't believe that with all the accomplishments, I'm still talking about weight." She's talking, of course, about her recent revelation that she's gained back all the weight she worked so hard to lose.

What went wrong? Oprah has a bunch of reasons for her weight loss. Her recent thyroid problem, for instance, caused stress, and she spent a portion of the past year feeling depressed and sleep-deprived -- that's when cravings tend to get the best of someone. But ultimately, it came down to loving her body. "Your overweight body doesn't crave food," she says. "It craves love."

Oprah plans on losing the weight again by following these rules of thumb:

• Planning meals is essential. Oprah's weekly meal list includes steel-cut oats, egg whites, salmon and sweet potatoes.
• Exercise is also essential. Oprah says she's accepted that she absolutely needs to do it, and it's time you do too. She does cardio and resistance training.
  
• And it should be challenging. When doing cardio, you should be working hard enough that you have trouble speaking. When using weights, you should focus on a different muscle group each session.
  
• Above all, you need to love yourself enough to put yourself at the top of your to-do list.
  

This is all great advice ... but not exactly ground-breaking news or anything. Do you think Oprah can do it again?