I stumbled upon some new shortcuts in Natty Narwhal to dock a window in a certain position.
Try out Ctrl+Alt+<Number Pad Key>. This will dock your window according the position of the number in the number pad. Note that it doesn't work with the numbers along the top of the keyboard.
1: Bottom left corner
3: Bottom right corner
5: Middle (but not maximized)
7: Top left corner
9: Top right corner
If you press the same number several times, it will change the size of the window.
I found this super handy when I needed to fit things inside my monitor, such as having 2 terminals side-by-side.
Try it out and let me know what you think down below in the comments!