Top links: Forum activity (very often, too much in my opinion it can keep me distracted from whats in front of me in MD) , Free Credits and View announcements (somewhat, every time there's an announcement or I need to review an old one or when credits are up), Restrictions/Known Issues (not often, if I need to review a rule/if I remember to really). These all seem very important to me.
Bottom links: Same as toplinks with Restrictions and Contact being used not often and perhaps Bug Report though all of these links look like they should be here.
Right Bar: same country, most popular and active vets all at not often, Webcam, Quest Clickables and Role Tags at somewhat, Mood Panel, Public Logs at very often.
I had an idea for the sidebar or the "right bar" links while writing this about which links you might want to keep there or move elsewhere perhaps along with a lot of the other links (moving them to inside the "see more" part of the sidebar as shown in this picture linked) http://storenow.net/download/0cbf22ff6bac28b73a2a037bf8a99fef/sidebarseemore.jpg
Basically everything within the square I drew would stay there and be unmoving and it would be the most important links (such as Quests) that people want to use, everything else can be put inside the "see more" just below, but above where the mood panel/public logs show up at. Or this all can be done the opposite way whichever is preferable.
Ah and I can't forget the "who's online" is one of my most clicked buttons probably. excuse my crude paint skillz
Something that I use a lot that takes a while to get to is my creatures page, getting to and from each creature and checking won fights + heat and ages for all of them can be a pain, if there was an easier or quicker way to display it it would be nice but I don't know how to do that. Perhaps two links within the creature page that is like a "go to next creature" and "go back one creature"
Documentation pages all seem fine to me if you mean ~ Friends ~ Papers ~ Spells ~