Well, I'm not going to pay someone very much to help me make less awkward introductions. It probably depends on what exactly I want to improve, and why I can't do it with standard deliberate practice and research.

(I'm pretty sure this is common knowledge by now, but if it's a question of anxiety keeping you from doing things you want to do, cognitive-behavioral therapy has consistently been found to be more effective than other forms of treatment and placebo for anxiety disorders. Here's a nice 2010 review of meta-analyses--you don't actually have to create an account to view/download.)