H\onestly, I'm just doing my best.
If you'll allow me a chance to ramble (which is honestly all I do), I think the only thing I do is just let myself create honestly. I have notebooks, and I have several files on my computer dedicated to characters, the world, and all that good stuff. And I know that there's a lot of material that people won't ever see in the story. But I'm unapologetic in that. I just make something because I want it to be made.
The organisation comes with my obsession to detail, and even then there's a lot of madness in the detail. I think we've to be more in love with our projects and being okay with the fact that there are things we won't show people or with things that won't immediately show themselves. That helps us create a more motivated working environment, and it makes us excited for the things we will eventually share with people.