ergophobe - 12:56 am on Apr 26, 2012 (gmt 0)
I'm always surprised at how easy it can be to rank for some long-tail terms. You can start with a standard glossary that likely won't rank for anything. Then just mine your analytics logs to see which long-tail terms have brought you even one visitor.
If you've gotten one visitor for a long-tail term that you are not optimized for, then you can certainly rank for it bring in visitors if you build a page about that term, have an optimized title, some decent content and point a couple of links at it (even internal links).
I think of that as "chipping around the edges" and it seems to build long-tail traffic pretty well over time while you wait to get some authority pages for tougher terms.