It's hard to resist that box of doughnuts, but you should try to stay away from these foods as often as possible. This comes from eDiets.com.

• Doughnuts. They’re fried and full of sugar and white flour and a lot of them contain trans fat, too. To burn off the average 400 calories in two glazed doughnuts, you’d have to play basketball for about 40 minutes! Plus studies show that sugary foods cause your blood sugar levels to plummet after just 90 minutes, which’ll make you feel cranky.
• Sugary cereals. Most of them are about as healthy as a dessert. In fact, at least 11 popular breakfast cereals contain 12 grams of sugar or MORE. That’s roughly the same amount as a frosted doughnut! So read those labels – when the first ingredient on the box is sugar, watch out. Key words to look out for are "dyed" and "sweetened."
• The cheeseburger. Most of the time, they contain a white-flour bun – refined carbohydrates, processed cheese – which usually contains saturated fat and trans fat, plus lots of additives and preservatives, and fried red meat – which can be loaded with cholesterol and saturated fat. Saturated fat has been linked to heart attacks, strokes, and some kinds of cancer. Not to mention that some restaurant cheeseburgers can contain over one-thousand calories! It’d take about an hour-and-a-half of running to burn that off! Go ahead and grill your own burger with LEAN beef, on a whole wheat bun, mustard no mayo.
• Canned soups. Many of them contain trans fats, more than half a day’s worth of sodium and even MSG. A lot of condensed soups are culprits – but they’re also the cheapest. So if someone’s on a budget, they may be ruining their diet. So look at the labels – and try to pick one with 200 calories or less per serving. You should also watch out for hydrogenated fat – which is basically trans fat - and sodium.