Photoshop Keyboard Shortcut

GENERAL
ctrl+s = save
ctrl+c = copy
ctrl+v = paste

LAYER
ctrl+t = Free Transform current selection or layer
ctrl+e = Merge down layer
v = move tools
crtl+layer thumbnail click = layer selection

BRUSH
, = Brush smaller
. = Brush larger

SELECTION TOOLS
ctrl+a = Select All
Shift+ctrl+i = Invert Selection

COLOR AJUST
L = Level