The Turkey City Lexicon, A Primer for SF Workshops, is an eminently useful checklist of typical errors and bad writing clichés that turn up in science fiction writing workshops.
Do you attend writing workshops? They can be a lot of fun, and you can learn a lot. Well, it depends on the people who attend it. Come to the workshop with an open mind and open ears.
This Wikipedia entry lists several well-known writing workshops and links to them.
As for myself... I live in Scandinavia and can't find workshops near where I live. So I'll have to manage with the Baen's Universe Slushpile for peer review...