Request that DokuWiki developers incorporate sidebar (as shown at
http://www.jandecaluwe.com/testwiki/doku.php/) into the official DokuWiki release.
I often get lost in various Wikis and while it could be argued "that's the idea", or "that's a good thing", it can also be very frustrating. I think "sidebar" is an excellent addition to DokuWiki and should be promoted to official status.