Another way to keep up with new stuff...
The icons beside the forums and topics will be dark blue when there is stuff in there you haven't read; they'll "shadow out" after you've read everything. Another way to keep up with new stuff is to mark a forum (or even the entire board) as "read." This will shadow out the icons beside the forum(s) and topics; when new stuff is posted, the icon will turn dark blue.
To mark the entire board as "read," scroll all the way to the bottom of the page and click the link in little itty-bitty letters that says, oddly enough, "Mark Board as Read."
To mark just a single forum as read, go to the forum view, where you're seeing all the topics listed in that forum. In the dark blue header that lists the name of the forum, on the far right side, you'll see an even smaller link in parenthesis that says, "(Mark this forum as read)"