At the moment I don't, or barely. After months away from it - enforced by work load - I'm having trouble getting back into it now that the load (or at least the urgency) and slackened off a bit. But when I do...
Sitting at my main computer using LibreOffice, dual 27" screens (okay, so I only use one of them while actually writing

), natural keyboard. Sometimes headphones and sometimes not.
Sometimes I take a notebook (paper) and pen when I pretend I'm going to write elsewhere, but generally it only gets used for is doodles. And sometimes I take a notebook (computer) when I pretend I'm going to write elsewhere, but generally my time is lost fiddling with settings and stuff.