I sometimes do this. I have a chart on my fridge and I list what I eat, when I eat it, the calories and carbs I eat (did this because I noticed that I was paying way more attention to carb consumption and not calories, and I was having WAY too many calories per day, so now I can track it easier and make better choices). I have 3 meals and a snack per day, but I always allow for a 2nd snack in the evening if I really need/want it. If I don't, then those budgeted calories/carbs go uneaten for the day. If I do, it was already budgeted in and I'm still within my limits. Sometimes it's all about playing head games with yourself....and winning lol