Dan Dascalescu's Wiki
DIY hacks - how to have a 6th (magnetic) sense
How to correct barrel distortion in photos, or the reason why you don't look photogenic
Excel is one of the most overused pieces of software I've ever seen. Learn how to search backwards in Excel, among other things.
Catalyst - the elegant Perl web framework
Indenting TT and HTML - a recommendation for indentation of Template::Toolkit code around HTML