Mopping a floor well and mopping it badly take about the same time. Only one of them builds a reputation.

The difference between careful and careless work is usually attention rather than minutes. Doing it properly costs a little more focus and almost no extra time, while the results are visibly different to anyone who looks. Since you are spending the hour either way, the question is only what you have at the end of it.

Take whatever task you are about to rush and do the good version instead. Time it if you want the evidence. The extra cost is smaller than you think and the record it builds is not.