I was going to pick up an Alphasmart a while back but felt guilty for how little it would be used, and ended up in Nano on my old MSI Wind... It's still amazing how much you can do with these devices. So I'll have a movie open, Falkon on the side, and several terminal sessions. Semi-distraction free since browsing is costly and the movie will be something I've seen before...
For the regular desktop and distraction-free feel, I like to use Breeze for MS-DOS in DOSBox, or mcedit.
typing on normal keyboard with all the copy-paste etc. functionality is just so much better.
An even more extreme variant I used was to create a separate user profile with just the word processor in it.
Now just lock the other OS until I’ve hit a certain word count and I am already preparing my BIOS