I’ve just got access to a short video made for the Teaching English British Council facebook page at IATEFL Manchester 2015 which I’d completely forgotten about! In it, I describe a method you can use to encourage students to notice mistakes they make in writing and try to reduce them. Unfortunately I can’t embed the video here, but I can give you the link to watch it. I’m not sure if you need to be logged in to facebook to see it, and I don’t know how to get around it if you don’t have a facebook account – sorry!
You can see examples of how I used this kind of error categorisation in my own Russian learning in the ‘Writing’ section of the post How I’m learning Russian (part 2).
Have you tried anything similar?