Do you want to create layouts that look so realistic its as if you could reach out and touch them? The secret is in the shadows! I've created a set of 6 custom shadow styles that will give realistic drop shadows to almost any element. These include:
Paper shadow
Small element shadow
Large element shadow
String shadow
Acrylic or vellum shadow
Stitch or staple shadow
Opposite edge shadow

After applying your custom shadows, there is a set of 5 actions that will help you customize your shadows even further, including:
Paper shadow and Opposite edge shadow (automatically applies both styles to selected layer)
Small element shadow and Opposite edge shadow (automatically applies both styles to selected layer)
Warp shadow (allows you to warp the direction and placement of the shadow to make them more realistic)
Shadow blur and fade (adds a blur and lowered opacity to your shadow layer to product a more diffuse shadow effect)
Warp, blur and fade shadow (combines the above 2 actions)

These styles and actions were created in Photoshop CS4 and tested in CS2, 3, and 4.