A full week of paid work is the block in the middle. What remains after that week looks like free hours waiting for the jaws: Saturday morning, a Sunday hour, the gap after dinner on one weekday. Those pieces are real. They are also short. If they scatter across the week they crush sleep, the commute, and Monday.
A bar clamp holds work firm without remaking the timber. It does not replace the bench. It closes to a stop. Leftover hours work the same way. Write a maximum. Put that block between the jaws. If an offer needs every weeknight, it is not leftover work; it is a second job wearing leftover clothes.
What sits in one opening
Start with one visible block. Saturday morning is the default used on this desk because it does not steal weeknights by default. A person can add a Sunday hour or one weekday evening. Adding every evening is not leftover time. That is a second shift.
Write the start and the stop before the week begins. A block that is only "when I have energy" slides off the bar. The day job will take it.
What crushes the paid day
Unpaid setup that has no end date, learning that is sold as a condition of the first invoice, and work that needs a weekday night every week do not belong in this clamp. Those openings crush the rest of the week.
Bar Clamp does not publish earnings promises. The question is whether leftover hours can sit still long enough to be counted, priced after costs, and marked in a weekly note. If they cannot sit still, they are not leftover.
Read next: clamping spare evenings on the bar and a stop before crushing the paid day.