Photoshop (very useful Shortcuts)

B - (Brush Tool)

[ - (Brush Tool - smaller brush)

] - (Brush Tool - bigger brush)

[ + shift (Brush Tool - softern brush edge)

] + shift (Brush Tool - Harden brush edge)

[ + alt - (select layer DOWN)

] + alt - (select layer UP)

G - (paint bucket - add shift to cycle to the gradient tool)

F - (cycles Screen Modes)

Tab - (Hides Toolbars to max. screen room)

Spacebar - (Hand Tool)

X - (Switch Colors between Forground/Background Colors)

D - (Default Colors) brings forground/background colors to White and Black. Great for editing masks

Ctrl + Shift + N - (New Layer [with dialogue])

Ctrl + [+ or -] - (Quick Zoom in Zoom out)

Ctrl + S - (Save)

Shift + Backspace - (Fill dialogue) Good when working with MASKS

Ctrl + T - (Free Transform)

Ctrl + E - (Merge Current Layer with layer beneath it)

Alt + Click Mask - (Toggle Mask Visibility)

Ctrl + J - (new layer using copy) copies selection or layer to a new layer

Q - (toggles Quickmask)