It takes bravery to let outsiders handle your writing. However, the feedback you receive is valuable. One of the best resources writers have available is workshops. You get the feedback from a number of people with different backgrounds in one place (some more useful than others, but that's the risk you take).
There's nothing wrong if you're the kind of writer who still shuffles note cards around on your desk or wall, but if you want to move forward a bit, technology has developed an equivalent in the form of Evernote.