Keep going back here and finding good stuff: http://www.guuui.com/index.php

Lots of goodies here: http://iainstitute.org/tools/

An article by Alan Cooper almost ten years old and still excellent: http://www.cooper.com/articles/art_goal_directed_design.htm

A quote from it that resonates: There is a close parallel between corporate goals and personal goals: both are the highest expressions of goals for their respective owners. Consequently, they are the most important and neither can be slighted. Software that fails to achieve either one will fail. Software that fails to achieve the personal goals of its user may not fail at first, but it won't earn loyalty from its customers, and will be very vulnerable to competition that does.

An interesting way to look at usability methods: http://www.usabilitynet.org/tools/methods.htm