The problem is, people put too many forums on their sites. I've gone to forums that are set up exactly like this, with about 2 topics per category:
Announcements
Important forum events here.
General Discussion
Topics related to forum, post here.
Post your builds here.
Suggestions
Post suggestions here.
Clans
Discuss clans here.
Clan Applications
Post your clan applications here.
Clan Gallery
Post your clan builds here.
Gallery
Featured Gallery
Moderator picks.
Modding Discussion
Mapping Discussion
Mapping Help
Modding Help
Game Help
Media Discussion
Discuss all other media types here.
Movies
Talk about your favorite movies here.
Television
Talk about your favorite shows here.
Internet
Talk about the Internet here.
Books
Talk about books here.
News
Talk about news here.
Games Announcements
Announcements Related to games.
PS3 Unreleased Games
Talk about unreleased PS3 games here.
PS3 Released Games
Talk about released PS3 games here.
Xbox360 Unreleased Games
Talk about unreleased Xbox360 games here.
Xbox360 Released Games
Talk about released Xbox360 games here.
Wii Unreleased Games
Talk about unreleased Wii games here.
Wii Released Games
Talk about released Wii games here.
PC Games
Talk about games for the computer here.
Runescape
Talk about Runescape here.
World of Warcraft
Talk about World of Warcraft here.
Computer Announcements
Announcements about computers here.
Computer Hardware
Talk about hardware here.
Linux Help
Windows Help
Mac Help
Miscellaneous discussion
Discuss the miscellaneous forums.
Off topic
If it doesn't fit anywhere else, post here!
Spam forums
Spam here.
Ban appeals
Appeal your forum bans here.
Forum Forum
Discuss forums here.
Home improvement
Lollipops and candy
It could just be condensed like this:
Announcements
General Discussion
Suggestions
Gallery
Feature Gallery
Mod Releases
Mod Discussion
Help
Computers
Off-Topic
You can merge announcements and general discussion and just use stickies. You might be able to merge computers and off-topic as well.