Ever get a great idea for your writing at an inopportune time? Like when you're standing in line at the grocery store? Or when you're sitting at a red light? Or when you're walking to your car?
Don't let those fleeting moments go away. When those fireworks are going off, don't just ooh and aah, dang it. Take a picture! I've let some of these thoughts slip away, either because I was unprepared for them or because I thought I would remember them later on.
I've learned to come prepared, and now I carry a notebook every single place I go. This may seem like some very basic stuff we're dealing with here, but this is something that you have to do everywhere. I don't go anywhere without a little notebook in my back pocket.
If I'm just walking up to the gas station a block from my house for whatever, I bring it with. I bring it downstairs into the laundry room, even though I know the laptop is right upstairs. The best thing about the notebook is that it gives you a running start when you hit the laptop to write at your next session.