Use them and save time.
Generally used
f Full screen
Space Pause or play movie
v Subtitles on/off
b Audio track cycle
Ctrl+Arrow Up/Ctrl+Arrow Down Volume
Using Mouse
Double click Full screen
Scroll Volume or Position (see settings)
Right click Local menu (play controls, audio/video)
Movie Navigation
Ctrl+d Open disc menu
Ctrl+f Open folder (browse folder menu)
Ctrl+r or ctrl+s Advanced open file
Ctrl+o Open single file(s)
m Mute and unmute audio
p Play movie (from the very beginning)
s Stop movie
Esc Exit full screen mode
+/-/= Faster, slower, normal
a Aspect ratio
c Crop screen
g/h Increase or decrease subtitle delay
j/k Increase or decrease audio delay
z Change zoom mode
Ctrl+1, ctrl+2, ctrl+3,ctrl+4 Recent media (in Media - Recent media menu)
t Show time
Ctrl+t Goto time
Jump in Playback
Shift+Left/Right Very short jump (3 seconds)
Alt+Left/Right Short jump (10 seconds)
Ctrl+Left/Right Medium jump (1 minute)
Ctrl+Alt+Left/Right Long jump
Manage VLC, Playlists, and Special Commands
Ctrl+h Hide / unhide controls
Ctrl+p Preferences/ interface settings
Ctrl+e Adjustments and audio/video effects
Ctrl+b Edit bookmarks
Ctrl+m Open messages
Ctrl+n Open network
Ctrl+c Open capture device
Ctrl+l Open playlist
Ctrl+y Save playlist
Ctrl+i or ctrl+j Media information
Alt+a Open audio menu
Alt+h Open help menu
Alt+m Open media menu
Alt+p Open playlist menu
Alt+t Open tool menu
Alt+v Open video menu
Alt+l Open playback menu
d Show movie path
n Play next movie from playlist
F1 Show Help
F11 Window full-screen (not equal to pressing F)
Alt+f4, alt+q or ctrl+q Quit VLC