It's always great to get a look into how other writers manage this bizarre creative dance/job. Lucas Bale analyses his own writing processes from First Draft/Research through to Covers and Marketing:
As I’ve said, I plan pretty assiduously. I am currently working on the outline for the second book in the Beyond the Wall series. However, because the themes are central to the whole series, as well as individual books, and there is quite a bit of world-building going on, I find it easier to have a solid outline which I can depart from if I like or change when I want.
It's a great read if, like me, you suck at organising your writing or hope to get some insight into another writer's approach.
Check the whole article out here (including some great photos): http://www.lucasbale.com/blog/2014/3/26/lucas-bale-analysing-a-writers-process