Generally, I write 4500 words a day on my major projects. If I miss a day, I make it up the next day that I have time to do so. Since I started two books, I write 3000 on one and wait a while before typing 1500 on the other. I need the time to switch gears, I think, since they're both fantasy.
After that's done, I edit. And edit. And edit. So boring.
So I write more after that, usually on short stories. Ocasionally, I'll construct a poem. That's really all I have time for though, or I'd write more. It seriously takes up every ounce of my spare time between college and work.
Come to think of it, I haven't had a good sit-down-and-write-from-dawn-to-dusk day in a while. 25-30,000 word days. Woo!
To get the creative engine going, I usually just write. I might have to go back and rewrite the first two paragraphs, but aside from that everything seems to fall into place pretty well. Probably because I can't sleep otherwise. My work is the first thing I see when I wake up and usually the last thing I see before bed, so I sleep, then pick up where I left off.