As many people have noted, Less Wrong currently isn't receiving as much content as we would like. One way to think about expanding the content is to think about which areas of study deserve more articles written on them.
For example, I expect that sociology has a lot to say about many of our cultural assumptions. It is quite possible that 95% of it is either obvious or junk, but almost all fields have that 5% within them that could be valuable. Another area of study that might be interesting to consider is anthropology. Again this is a field that allows us to step outside of our cultural assumptions.
I don't know anything about media studies, but I imagine that they have some worthwhile things to say about how we the information that we hear is distorted.
What other fields would you like to see some discussion of on Less Wrong?
I've done a couple LW posts on speaking skills (none intended to be Dark Arts-y), in case you find any helpful:
Four Tips for Public Speaking - The four tips that seemed to improve speeches the most, fastest, when I was mentoring other speakers in college
False Friends and Tone Policing - Ways to recognize if you're giving inadvertent offense that is making it impossible for your audience to listen to you
Change Contexts to Improve Arguments - Putting thought into choosing good environments for disagreement (my living room, with freshly baked cookies, makes people feel safer and more inclined to engage with ugh fields, than rapid-fire and in public on facebook)