But I in this tutorial I have handpicked some of the best and most useful shortcodes that come handy quite a lot. I am the great fan of keyboard shortcuts and would encourage you to give them a try and trust me you will love them as much I do.
Alt + Shift + w gets you full-screen mode for distraction free writing while again pressing the same key combination will toggle back to Rich text editor. The most used shortcodes are  Alt + Shift + m to Insert Image and Alt + Shift + a to Insert link at your pointer position. At any point, if you want help the press Alt + Shift + h.
I have also made a clean infographic that you can download for quick access to all the shortcodes for WordPress.

Updated: September 5, 2016