As for thinking time versus writing time, well, that's up to you. But - and I wish it were otherwise - books don't get written by thinking about them, they get written by writing them. And that's when you make discoveries about what you're writing. That's when you get the happy accidents.
Neil GaimanAll around me darkness gathers, Fading is the sun that shone, We must speak of other matters, You can be me when I'm gone Flowers gathered in the morning, Afternoon they blossom on, Still are withered in the evening, You can be me when I'm gone.
Neil Gaiman