Fitness trackers can muddy the water when tracking calories. There are so many variables that can influence the amount of calories an individual burns in a day by inflating your exercise, and over estimating how much food you're actually eating, individuals can struggle to accurately track her calories. Develop a system of averages. What averages of movement do you do every day? What averages of food intake do you do every day. By understanding an average you can fail on the side of surplus or deficit to help you get results.