I let ideas swim around my head for monday-wednesday, then i get writing on thursday after I'm done reading my comics haul (which is getting harder, thanks to marvel bringing out so many bloody comics a week).
On thursday I'm usually writing script; I try to keep my first level script a few installments ahead of my production, and then I copy one installment a week into my panel script, where it's decided how I'm gonna structure the story on the page, and make any edits to dialogue or actions.
Then, friday-sunday, I'm drawing, usually from the time I come home at 4 on friday until I finish on sunday, only stopping for breaks when my butt hurts from sitting down too long. I listen to music while i work, usually playlists based on the comic, event, or character, that I'm drawing about.
These days, with marvel bringing out too many comics, I sometimes start on wednesday and dont do anything on thursday, because by the time I'm done with reading it's too late anyway.