The big shortkey topic for PS

merge all layers: shift+ctrl+e

ctrl+c = copy
ctrl+x = cut
ctrl+v= paste

Ctrl+Z is undo, no need for alt..
And Ctrl+Shift+E is merge all visible.
Q- In/Out of QuickMask mode.
Ctrl+J - Duplicate Selection/Layer
Ctrl+Backspace - Background Color Fill

ctrl + q = close ps

:mellow:

Ctrl - Alt - Shift - L = Auto Contrast

Ctrl - Shift - N = New Layer

right bracket = lower brush size
left bracket = raise brush size

ctrl + B = color balance.. - not new layer

All till now:
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ctrl + z = step back
ctrl + d = deselect
ctrl + t = Scaling
ctrl + r = ruler
Ctrl + alt + Z for backwards lots of times
Control + D for Deselect
Control + T for Scaling
Ctrl+J = duplicate layer
Ctrl+shift+n = new layer
Ctrl+u = hue/saturation
ctrl + A = select all
ctrl + e = merge layer
D = reset colors to black/white
X = switch between the two colors
Ctrl+N = new document
S = Clone stamp tool.
Ctrl + Alt + Shift + S = Save for Web
Pen tool = P
Move points = Hold ctrl and click+drag points
Change curves = Hold alt and click+drag points

Lasso = L
Marquee = M
Subtract from selection (Lasso and Marquee) = Hold alt.
Add to selection (for both again) = hold shift

alt - F4 = quit
Ctrl + F redo effect
F1 = help menu
shift+ctrl+e = Merge all layers
ctrl+c = copy
ctrl+x = cut
ctrl+v= paste
Ctrl+Z is undo, no need for alt..
And Ctrl+Shift+E is merge all visible.
Q- In/Out of QuickMask mode.
Ctrl+J - Duplicate Selection/Layer
Ctrl+Backspace - Background Color Fill
ctrl + q = close ps
Ctrl - Alt - Shift - L = Auto Contrast

Ctrl - Shift - N = New Layer
right bracket = lower brush size
left bracket = raise brush size
ctrl + B = color balance

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ALT-F4 close window

Thnx dune

@ Da GFX 1st read then post..