I'm new to OSX and the thing I miss from Windows 7 is the ability to open a new window if you hold the Shift key and press on the Applications icon within the task bar.
Similarly, OSX does have a function where if you press the middle button (the scroll wheel button), it does open a new window.
I have not stumbled upon a way to do it with the Keyboard and Touchpad.
Command + Click App Icon opens a finder window where the .App is located.
Control + Click App Icon is similar to secondary click.
Option + Click App Icon triggers App expose.
I am aware that
Command + N opens a new window in most applications, however when working in multiple desktops, having a similar functionality to the middle button click with just the touchpad would be much easier.