Do you ever feel that you've worked all day and gotten nothing done? It is not only unpleasant to feel, it saps your motivation the next day.
Why do you suppose it happens? Do you think someone building a log cabin ever has that feeling? Or a potter making clay vases?
The problem you have is the nature of your work or the nature of human memory. There is a solution that will help you feel appropriate satisfaction at your day's work. It's called a "done list." Read more about it here: Motivation Principle Number Four.