I've published a few flash fiction pieces on http://365tomorrows.com/ but nothing to get excited about. Those pieces are short enough that I can write one out in one sitting, then I let it sit for maybe a week and then I go back and edit it. After maybe half a dozen rounds of editing I can get something I'm willing to put up. I don't have any kind of regular schedule.
I'm working on a script for a sci-fi graphic novel, but I don't have anything to show for it yet. I regular timetable would probably help with that. :-)
I've been writing a book for the past decade or so. The thing that is perhaps different is that I am not recording it anywhere but in my head - not on paper, not digitally, etc. I find this useful for a few reasons - as you write a book perhaps your ideas change as you are writing it. When the whole book is in your head, you can create a very non-linear network of characters, events, etc. I would like to make it into a book/comic/game/short film, but I doubt it will ever see the light of day. :)
No. I write in chunks, when the juices are flowing I can bride a lot of characters and events together. I have droughts too when life and relationships take over. Either way, I am 22 now, I want to finish it before 30. Sci-fi is really growing to be a bigger and bigger part of global culture.