@taq You may already know this but it's called 'executive dysfunction', it's really common in ADHD creatures in particular, though also happens in other situations. The "there is no practical barrier but I still won't do it" is the sign that that's what it is.

As someone who suffers from this for ADHD reasons, I've found a few ways to deal with it, though what works tends to vary by person a bit, also outside of medication.

One approach that has really helped me personally is acceptance; accept that I won't be productive all day, and that I won't recognize all productivity as productivity (because that's one of the traps of ADHD, you underestimate the work you do), and that this is okay.

An extension of that is the idea of "declaring the day wasted" - on days where I can't seem to get myself to do anything, I declare the day "wasted", which means I immediately drop all of my obligations for that day and don't "have" to do anything for the rest of the day at all.

About half the time, that relieves enough pressure that I will sort of naturally start doing productive things anyway (but without a sense of obligation this time!) because the problem was the pressure. The rest of the time, I get a relaxing day off out of it. Either outcome is fine. Overall I get way more done!

But all of this is in the context of recognizing that it's *fine* to not be productive, that productivity is something imposed on me, not a moral obligation; that doesn't mean I can survive without it, but that framing externalizes the sense of guilt (which would otherwise make the executive dysfunction even worse).

Long story short: to do more, try to do less. And depending on your situation and reason for your executive dysfunction, it may work for you too!