For a long time I beat my head against a wall and made video editing inordinately harder on myself without even realizing I was doing it. Listed below are all the keyboard shortcuts that I programmed that changed my entire workflow and easily tripled how fast I can edit a video
Organize Footage
I&O - In and out (duh)
J - Play clip backwards (tap again to double speed )
K - Pause
L - Play clip forwards (tap again to double speed)
F - Favorite Range (Specific moments from clips to maybe use for final edit)
Edit Footage
Q - Ripple delete before playhead
W - Split clip at playhead
E - Ripple delete after playhead
Z - Append to timeline
X - Delete
Open/Close Workspace Views
Tab - Clip browser
Opt:A - Angles
Opt:Tab - Inspector
Opt:S - Scopes