Right now I've been using Google Docs to write, then do a once or twice over quickly + some editing/rearranging before pasting it into Scribblehub as a draft, where I skim over it once again, try to make sure the formatting looks ok, though sometimes it feels like I'm fighting it a bit.
I have multiple monitors so I tend to keep research/references on one while I write on the other. Also helps when I make changes on Scribblehub as I can put Docs on the other screen and copy/paste changes back and forth trying to keep them in sync.
As for writing without distraction, I recall hearing that George R.R. Martin wrote on an very old laptop, like with DOS, and floppy disks, etc. To not have any distractions. While you don't have to go that far, I imagine you could find an old business class laptop with a nice keyboard(many of them are really well built), and write on with the internet disconnected in a room away from anything else.
Personally I'm looking forward to the day when e-ink screens become more ubiquitous, you can already get android tablets or note taking devices that have e-ink with Wacom stylus like pens but it's very expensive. I'd love to have one with a pen and keyboard though, whenever the technology becomes more affordable.