Nobody hands you a receipt for a wasted Saturday, but you still paid for it.

Money leaves a trail and time does not, so hours go out the door without anything to show what they cost. A day spent drifting feels free while it is happening and expensive only in hindsight, when there is nothing left to point at. The absence of a bill is not the same as the absence of a price.

Try giving one day of the week a shape before it starts, even a loose one. Two things you actually want to have done, and the rest left open. Rest counts, as long as you chose it rather than fell into it.