Diet advice is a lot like fashion. Trends come and a year later they seem hopelessly out of date. When those of-the-moment diet fads are gathering dust in the back of your metaphorical closet, the simple, sensible approaches will be there like a favorite pair of jeans or a little black dress—go-tos that get the job done time and time again.       Sip These Teas, Slim Down:Green isn’t the only type of tea that promotes weight loss. We've got 5.   Feel Better Faster: You can pick and choose parts from our one-day detox at any time for a little lift.   Grab and Go Energy: Keep these (no-mess) snacks in your gym bag for the best after-workout boost.   Meet These Greens: Mix up your meals with 10 salad stars that are healthier than King Kale.