Moving the Dock!
It is pretty well known that you can resize the Dock by clicking on the line between the trash and the application icons and dragging it left or right (up or down if your dock is on either side). One of the things that is even better is that you can hold down "Shift" while clicking on that divider. It will let you drag the dock at the left or at the right of the screen . Changing the location of the Dock can already be done in System Preferences, but this way is much quicker if you want to change it often. There are some applications that it is actually better to have it on the side, while some works better with the Dock on the bottom.