File Operations
Ctrl+S : Save file
Ctrl+W : Close file
Ctrl+N : New file
...
Editing
Ctrl+k : Delete to end of line
Ctrl+H : Delete to start of word
Ctrl+shift+k : Delete the entire line
Ctrl+(shift)+u : Change case (Alt+G seems to do the same...?)
Ctrl+alt+u : Title case
Ctrl+T : Transpose, for swapping words or chars.
...
Selection
Ctrl+A : Select all
Ctrl+Shift+arrow : Select entire word
Alt+left-mouse-button : column selection
Ctrl+left-mouse-button : Multi selection
...
Navigation
Alt+Ctrl+right/left-arrow : Next/previous tab
Alt+Ctrl+up-arrow : Go to header/source
Ctrl+G : Go to line
Ctrl+F : Find
Ctrl+R : Replace
...
View
Ctrl+p : Show/hide history
F4 : Show/hide visual undo
Ctrl+alt+P : Show/hide web preview
...
Document
Ctrl+M : Make milestone
Bundle
Ctrl+shift+B : Show bundle editor
Ctrl+alt+T : Select bundle
...