See Channels
This keyboard shortcut will instantly display your channels. Great for quickly seeing what your image will look like in black and white.
Canvas Size Action
When making an action to extend the size of your canvas, use percentage so that you can use that same action with images of all sizes.
White Backgrounds
Use the Multiply blending mode to drop the white background from behind your logos.
Change Opacity
You can quickly change the opacity with some tools by pressing the number of the percentage opacity you want to use.
Blending Mode Shortcuts
Here are keyboard shortcuts for the some of the more popular blending modes.
Spotting Your Images
Use the Navigator palette to zoom way in on your image and look for imperfections.