flipping through layers shortcut in photoshop

Scroll Through The Layers

To scroll through the layers in the Layers palette, hold down your Alt (Win) / Option (Mac) key and use the left and right bracket keys ( [ and ] ). The right bracket key scrolls upward through the layers, and the left bracket key scrolls down.

Just need to learn how to do this in Illustrator and Flash

source and more layer shortcuts...
http://www.photoshopessentials.com/basics/layer-shortcuts/