I've recently engaged in a valuable exercise with three other EAs. Each of us gave every other participant feedback on things they could do to improve themselves. Crucially, the feedback was anonymous (we used Admonymous.com or Google Forms), so there were no incentives to lie or misrepresent one's true opinions. All participants were pleased with the results, and thought the exercise was worth it. I'd be interested in repeating this with other people; if you would like to participate, let me know. (The only restriction is that each participant must know all others sufficiently well to give them non-trivial feedback. I think knowing the person solely from online interactions (e.g. on Facebook) might be enough, though.)