Eat cereal for breakfast five days a week

21. Eat cereal for breakfast five days a week. Studies find that people who eat cereal for breakfast every day are significantly less likely to be obese and have diabetes than those who don’t. They also consume more fiber and calcium—and less fat—than those who eat other breakfast foods. Of course, that doesn’t mean reaching for the Cap’n Crunch. Instead, pour out a high-fiber, low-sugar cereal like Total or Grape Nuts.