1) The average member seems to have a less-than-standard ability to use the English language. That or less than 10 seconds to post a line or two in reply. Spend a little bit more time on your posts and people might be more interested in reading your thoughts.
I'd just like to state that it seems like the people living outside of the US, England, and other countries seem to do much better in general when expressing themselves through English on this board. Sad, really.
2) Don't fill the board with silly shit. Post worthwhile topics. People don't come to a video game forum to talk about dirty socks, sex, the Super Bowl, or how you saw your Mom in the bathroom this morning, etc. Well, wait, maybe we do want to hear about that last one. We might get a good laugh out of it if there's a good story involved...
3) Tell your friends about SX. Word of mouth is so very powerful. If you enjoy a site, tell your friends. People would appreciate URLs to actual sites and not URLs to stupid fucking jokes on a joke archive site. Send them a URL of SX if they like Sega or video games in general.
4) SX itself doesn't have to be updated daily for the Forum community to be active. So don't bother or blame Iceman or anyone who happens to be on the staff. People don't stop coming to a Forum because a site's "dormant." They stop because they find it's not worthwhile visiting anymore (usually due to the quality of the post content, etc.).
Just a few thoughts I typed up in a minute...