I'll fill those canyons in your soul, like a river lead you home. And I'll walk a step behind, in the shadows so you shine. Just ask, it will be done and I will prove my love, until you're sure that I'm the one.
At the very end of a book I can manage to work for longer stretches, but mostly, making stuff up for three hours, that's enough. I can't do any more. At the end of the day I might tinker with my morning's work and maybe write some again. But I think three hours is fine.