I think that goes without saying, although most of the techniques discussed apply to anyone who would use TextMate. One could compare it to learning vi, but vi kind of forces you to sit down and learn because it's almost unusable without putting a good bit of it into muscle memory. I ran thru some of these, mixed+matched, read some TextMate docs and whipped up a quick cheat sheet on card stock that I taped to the top my center screen. Hopefully the horrificness / embarrassment will motivate me to memorize them.