Sit and tap, click. Read, wait, scratch your neck, and sit tap click again, hoping that something you write will really be good, really worth writing and worth reading. And it might be, because it's happened before-- thoughts are suddenly clear, and you can synthesize them freshly, easily. Words spring from your fingertips with unexpected slick felicitous facility, even if they sound a little over the top and dumb.
Sometimes it's a waste of time to sit and tap, pecking keys with the reluctance of pecking an aunt.
But sometimes, even when you don't say much, you get get the feeling that something greater than you has come through your fingers, through your mind. You actually write something better than you thought you could write, don't you? And that makes it interesting. That makes it worth sitting, tap, click.