To the extent there is a single mindset, it’s in execution orientation more than the various deficiencies that interrupt it.

That said, the most common forms are procrastination and perfectionism. The former results in mis-prioritization, e.g. fucking with the font in your incorporation docs instead of making sales calls. The latter in task obsession, e.g. fucking with the wording in a sales message.

My demon was the former, so I can speak to it directly: pick up hobbies that force you to prioritize on the fly. For me, that’s been backcountry skiing, diving and flying. Except, of course, those are hobbies I picked up after my startup. The real answer is to find a co-founder (and/or team) who balances your patience setting.