Here is a list of my shortcuts and actions I use

S - Smooth tool

Ctrl+O - Outline stroke

Ctrl+E - Expand Appearance

Ctrl+Shift+E - Expand

F2 - Divide Action (Divide, Ungroup)

F3 - Reflect Horizontal Action (Transform, Reflect Horizontal, Copy)

F4 - Reflect Vertical Action (Transform, Reflect Vertical, Copy)

F5 - Clone Action (Copy, Paste in Place)