It is hard when the ideas are coming really fast. It's hard to keep up with them. I've got nearly a dozen long fics that I want to write, but I write slowly enough that I'm only likely to get to one or two of them. One of them is unlikely to progress because I need a co-writer who knows the fandom (Rurouni Kenshin) and can write fight scenes.

My big fic, I'm posting chapter by chapter, so I can't go back and fix things when I find I've made a mistake (there are a few threads I've dropped that I'm not sure how to pick up again). I don't intend to post chapter by chapter again. At least, I don't think so. It's nice to get the feedback as I go along, but I'd kind of like the freedom to rewrite.

I'm not spectacular at world building. I tend to come up with just what I really need for the scene at hand and hope that I don't contradict myself or write myself into a corner. I've seen that referred to as 'writing on the bubble.'