What are all the special hotkeys in starcraft 2?

A full list off all hotkeys can be found here, under the keyboard advertisement.

But they are also listed in Menu (F10) -> Options -> Hotkeys, as seen in the next picture.

Hint: You can also set the Grid profile there, so you don't even have to learn the in-game hotkeys.
That profile maps each Grid Command Buttons to rows of keys on your keyboard.

This greatly decreased finger movement and allowed me to increase my APM a bit...

So a Refinery would be: Z E, a Supply Depot: Z W.

Z is then the lower left button, W and E being the second and third button on the first row.

Source: http://www.starcraft2freaks.com/how-to-use-starcraft-2-grid-hotkeys/

Warning: If you don't have the US keyboard locale installed, the grid profile does not work (it just uses the standard profile although the Grid one is selected in that screen -- it also changes the hotkey for warpgates from W to Y among a few others, very messy)

Press Spacebar to center on the most recent event.