Photoshop Shortcuts

Apple + U-Hue and Saturation
Apple + T-Free Transform
Apple + Delete-Change color of image to your foreground color
Apple + J-Duplicate layer
Apple + E-Merge
Apple + F-Run the last filter
Apple+C-Copy
Apple+V-Paste
Apple+A-Select All
Apple+S-Save
Apple+Z-Undo
Apple+D-Deselect
Apple+N-New Document
B-Brush tool
T-type tool