I’ve been curious how people shadow, what they think of it. I just started shadowing JLPT stories. I generally listen twice, then listen and read, then look up words I don’t know, and finally shadow, stopping after each phrase. I’ve been curious about doing this with Assimil and other resources as well.
One thing you may also want to add is recording and listening to yourself speak so you can compare against the native speaker. That way you aren’t just basing it on how you hear yourself in your head.