* Cmd-E to copy text directly into the Find buffer.
* Cmd-Return / Cmd-Shift-Return to open a new line (or append a semicolon to the current line and open a new line).
* Cmd-Opt-. to close the current XHTML tag.
* Automatically typing of closing quotes, braces, etc (sometimes annoying, usually helpful).
* Opening a folder instead of a single file.
* Cmd-T (Go to File) and Cmd-Shift-T (Go to Symbol). Nicely intelligent live searching. Go to File looks for files in the current project (or current folder, if that's what you opened), and preselects the previous file you jumped to - it works like a Cmd-Tab, so to quickly flip between two files in the project, just invoke Cmd-T & hit enter.
* Esc for symbol completion.
* Cmd-H to pull up API documentation.
* Cmd-/ to comment out lines or blocks of lines.

E.g, Light font smoothing style in Textmate.

$ defaults write com.macromates.textmate AppleFontSmoothing -int 1

http://pastie.caboo.se/81736

This is tested in TextMate and I use it to select successive hunks of a patch file in diff -u format.

(?m)^@@.*?^(?=@@)

This will pass all matched filenames to textmate, generating a project with all files flatly in the drawer (no dirs)

egrep -lr pattern * | grep -v .svn | xargs mate

svn --username anon --password anon co http://macromates.com/svn/Bundles/trunk/Bundles /Users/ned/Library/Application\ Support/TextMate/Bundles

This stops TextMate from writing it's ._filename metadata files, which can be annoying in mixed environments.

Not mine - from http://blog.amber.org/2006/02/27/stupid-textmate-tricks/

defaults write com.macromates.textmate OakDocumentDisableFSMetaData 1