One of the great things about being self-employed is that it is often possible, within reason, to juggle the hours around. I believe that in offices they call it flexi-time, where the hours per week have to be met, but you can choose when you work.
So, this is especially useful on a Monday, when I can go in late, and have already arranged for a light work load as I have made it so some of the work waits until Tuesdays.
The only problem is that it will make me lazy, and I tend to try to put everything off, which is no good at all! And that is why I have a diary type day planner, so I don't miss anything.