Selections in Action
If you are making a selection while recording an action, you can use percentage to make sure the action works on documents of all sizes.
Before and After
Use the history palette to see how your image looked at the very beginning.
Saving Presets
Set up presets for your own commonly-used document sizes.
Using Presets
Save yourself some time when creating a new document by using one of Photoshop’s preset document sizes.
Editing With Clone Source
Here’s a tip about using the clone source palette options to help edit your photos.
Clone Overlay Source
You can change the blending mode so that you can see the source overlay better when using the clone stamp tool.