KeyboardShortcut''''''s for the IntellijIdea IDE:

First, go to the source for keyboard shortcut reference cards for versions 8, 7, 6, 5, and 4.5, on Windows, Linux and Mac:

* in IntelliJ IDEA, select "Help -> Default Keymap Reference".  This displays the appropriate PDF.

* http://www.jetbrains.com/idea/documentation/documentation.html = "IntelliJ IDEA 8 Developers Documentation"
** Select (click on) the appropriate version on the left, then download and print the appropriate "Keymap" for your operating system platform.

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Other references:
* http://stackoverflow.com/questions/294167/what-are-the-most-useful-intellij-idea-keyboard-shortcuts
* http://www.dzone.com REFCARDZ for IntelliJ IDEA:  http://refcardz.dzone.com/refcardz/intellij-idea  ''(Free download -- with free registration.)''
* jGuru: "What are the IntelliJ IDEA keyboard shortcuts?" -> http://www.jguru.com/forums/view.jsp?EID=1380701
* I've created a Quick Reference Card: http://www.caracara.org/misc/quickref/ ''[BrokenLink]''

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Other useful keyboard shortcuts:
* '''Ctrl + Shift + {Up or Down Arrow}''' = moves lines/methods up and down in the source code.
* '''Ctrl + Shift + A''' = ''"It does a search as you type through all the commands in intellij. Not only that but when you find the command you want it also displays the corresponding shortcut key next to it!"'' -- http://stackoverflow.com/users/42491/montyontherun
* '''Ctrl + Shift + T''' = go to test package (or class under test, from test class)
* '''Ctrl + F12''' = "File Structure Popup" -- ''like the Eclipse Outline View.''
* '''Ctrl + H''' = "Type Hierarchy" view = shows a tree of parent and child classes of this class
* '''Shift + F7''' = "Smart Step Into" (in Debug mode) = with multiple calls on the current line, it displays a popup of calls that could be made, highlighting by default the one that you're most likey to want.  (Works well if you're mostly ''not'' interested in debugging getters.  ;-)

See also:
* '''Help -> Productivity Guide''' = ''"It tells you what are the shortcuts you use/don't use and displays usage statistics. It will guide you to the unknown features."'' -- http://stackoverflow.com/users/17613/kineas

Useful Plugins:
* Key promoter: http://plugins.intellij.net/plugin/?id=1003
* Shortcut Keys List: http://plugins.intellij.net/plugin/?id=2391