keto xcg your activities and exercises, thus being able to calculate the calories burned over the various activities in your journal. If you want a bit of a shortcut to estimating the calories you burn, you can use an online calorie calculator that will give a more general estimate of the calories you burn a day. . Tracking the nutrition in your diet: In your journal, you can keep a record of whatever nutritional values you are interested in for the foods and drinks you consume.