I only get half an hour for lunch at my current job (although I do get to leave at 4:30, which is nice). That's still enough time to unpack Bunny the Adorable Miniature Laptop and do a little bit of writing. I've started bringing microwave soup for lunch, the kind you drink through the lid, because I can type in between swigs.
Sometimes it feels odd, though, switching from work-thinking to writing-thinking without actually leaving my cubical. One minute I'm data entering with the best of them, the next minute I'm writing a tricky scene in which someone gets killed with an axe.