I track my calorie deficit average over the previous 7 days. So today's Friday, my average deficit looks at last Saturday through today. This mentally stops me from having a blowout day and starting a new week over again. It also helps me keep perspective if I eat too much or exercise too little on one day not to just through in the towel on the whole plan. As long as I can add a little more exercise and/or cut a 1-200 calories over the next 6 days, I can "repair" mistakes.
For example, at my starting weight I was aiming for average daily deficit of 1100 (you get a lot of maintenance cals at 265!). One Saturday I swam laps for 85 minutes and then did my grocery shopping on the way home. Big mistake. I was so hungry I bought something I shouldn't and ate in in the car on the way home. Despite the huge calorie burn that day, my deficit that day was only 195 calories. However, over the next 6 days I made adjustments that ended the period with the daily average back up to nearly 1100.
Hope this makes sense. I call it my "numbers geek method of weight loss".