This is a great video from Rand at SEOMoz.  Although it was published over a year ago, the points he mentions are absolutely still valid and very relevant today.  The whole over-optimization thing is so 2000, so STOP DOING IT!

Ironically, I haven’t been doing anything on my own site for so long since I’m so incredibly busy, but the good news is, can’t over-optimize or penalize your site when you aren’t doing anything with it lol…  Although there are probably a few things I should tweak… anyway, catch up with ya all soon and enjoy the video.