Google Saturday, September 24, 2011
In the Google services mentioned above, hitting "Shift+?" will bring up a grid of all the keyboard shortcuts that are available for that service. Clicking on the "Open in a new window" link will display the shortcuts in a new browser window so that you can save them.
Here's what they look like:
You're not likely to remember each and every shortcut, but with some practice, you could at least remember few of the important one's. For when you can't remember them, however, there's always the "?"