I first came across this over 10 years ago, but it is still funny. The 100 Tips for Evil Overlords. This definitely appeals to the geek in me, and you can see from the copyright notice at the top that a bunch of Star Trek nerds came up with this. However, it applies to just about any area of geekery, so it should have a wider appeal than its source may indicate.
I advise checking out the cellblocks that contain additional advice for aspiring evil overlords. These have the more recent pop-culture references.