dbl-click-select-inside-brackets
Select inside brackets (normally done with ctrl-cmd-m) by double-clicking the opening bracket character.
dbl-click-select-inside-brackets package
Lots of code editors include the ability to select everything inside a matched pair of opening and closing brackets by double-clicking the opening or closing bracket.
Atom has the excellent bracket-matcher package, which allows you to do this with the ctrl-cmd-m key combination, but I missed the double-click so much that I wrote a plugin to add it.
This package currently supports these bracket characters: () [] <> {}
Enjoy!