My suggestion, and I think I have read it elsewhere on the forum, would be to tidy up the categories and rethink the front page.
i guess that a lot of people log on and look at the most recent threads, responding where they see something of interest. There isn't a long list of recent threads and a disproportionate amount of space is dedicated to outdated links. Effectively more screen space is dedicated to content from other websites than this one. Visually and functionally this isn't great practice. Especially when the links aren't updated very frequently, it gives the impression that content isn't dynamic.
Chop up the categories better and let the thread titles live on more real estate on the front page, my tuppence. Rethink the linked content policy...