Familiar with MT 3.12 Upgrade?

Hi, I am upgrading my Movable Type 3.0 installation to 3.12 over the holiday break (I work and go to school full-time, so I save the upgrades for between semesters, in case of calamity…). I know to trust instructions from our hero Robert of Wombatnation, as these have proved extremely helpful in the past. Does anyone have any additional DH-specific tips/gotchas before I dive into this upgrade?