Another great article by Ben Horowitz, about the psychology of being a CEO. I think it applies, to a large extent, to being a startup founder too - even a one-person startup founder. You have to deal with the same uncertainty, the same lack of guidance, the same "WIFIO" (We're Fucked, It's Over) rollercoaster.
And so this article is actually a very interesting read even if you're not the CEO of some prestigious company, but just the founder of your two-person startup working in a spare bedroom.