One of the hardest things about portion control is realising which foods are the most calorific. For example, half an avocado has roughly the same calorie content as 23 baby carrots. Which you probably wouldn't have expected. To help try and guide portions, SparkPeople have created some handy infographics as to what 100 calories actually looks like, based on the type of food. It looks like we'll be staying away from prunes, cheese and red meat in future!