I find the use of shortcut keys very useful. I used them all the time when I use to use 3DS Max and I want to know all shortcut keys and utilize them as much as possible in Blender. I like how you show on the video which shortcut key you are using which helps me learn the shortcut keys myself. When creating the pyramid I too used the I and E shortcut keys for every step of the pyramid I created. This cut down the creation time of the pyramid dramatically.