Scarcity is not a good thing. We fight against it. We seek abundance. If you produce good things, you should seek to produce as much as possible at the lowest cost possible. THAT is progress.
If you can easily produce 1 million exemplars of your product but you don't because you want to manufacture the scarcity in order to raise prices, then, imo, your product simply isn't hard enough.
The day you take off you have to fully commit to it. You can't half ass a day off. If you keep telling yourself you should do something better you're going to waste your day off on doubts.
Just take the day off king and don't even think about doing anything else. You're not gonna do anything super productive if you get to it anyway because half your brain is taking a day off.