You can go through a text to be published 5 times on a computer, print it out and for any text of decent length, I guarantee you will find a ton of stuff you missed. I have never tried using an e-ink device for that to see if it has the same effect, but I would be curious of the feedback on that if anybody here has done so.
Edit: I guess even for non-code text files, though I haven't used it for that purpose myself, yet. Bet many authors do.