Adobe Premiere Most Essential Shortcuts:
Below is a list of essential premiere shortcuts which are frequently demonstarted in our Adobe Premiere workshops. A more comprehensive list from Adobe can be found here as well:
https://helpx.adobe.com/premiere-pro/using/keyboard-shortcuts.html

Import media:
command i (MacOS) ctrl i (Windows)
Zoom in on sequence:
+ (MacOS and Windows)
Zoom out on sequence:
– (MacOS and Windows)
Fit sequence zoom level content to window:
\ (MacOS and Windows)
Insert edit:
, (MacOS and Windows)
Overwrite edit:
. (MacOS and Windows)
Set in point:
i (MacOS and Windows)
Set out Point:
o (MacOS and Windows)
Clear in and out points:
option x (MacOS) ctrl + shift + x (Windows)
Adjust video height view in sequence:
command + / – (MacOS) ctrl + / – (Windows)
Adjust audio height view in sequence:
option + / – (MacOS) alt + / – (Windows)
Toggle between two standard click height options in sequence:
shift + / – (MacOS and Windows)
Expand any window to full screen:
` (press again to turn off) (MacOS and Windows)
Play program monitor in full screen mode:
Control ` (MacOS and Windows)
Play around clip/edit point:
Shift + K (loop must be turned on in Program window). (MacOS and Windows)
Trim/edit a clip one frame at a time:
Option key held with left or right arrow keys used (MacOS). Alt key held with left or right arrow keys used (Windows)
Trim/edit a clip five frames at a time:
Option and shift keys held with left or right arrow keys used (MacOS). Alt and shift keys held with left or right arrow keys used (Windows).