I will show you a very nice technique to create 3D servers
Click to enlarge Or you can see another variation:
Start with a new document. Size 600x600 Pixels with a white background

Editor's Pick in Photoshop Tutorials, June 2007
This article for Photoshop shows you a good way to create a 3D Polaroid. You take the simply explained steps provided here by the author and then you can push them as far as you want to go to attain a fantastic effect.

Open a new document 500x500 pixels with a white background
Then create a new layer. ( Press Shift+Ctrl+N )
Select Rectangular Marquee Tool (M) and make a selection like mine:

This tutorial will show you how to create 3D looking text that is sinking into some hot lava, all in 1 effect, all in 5 simple steps.

Using a lot of new tools, make a 3-dimensional type text eff...

In this tutorial i will teach you how to create 3D text out in Photoshop out of normal flat text. You might find this method pretty tedious, but it will definitely produce quality results each and every time!

Editor's Pick in Photoshop Tutorials, July 2005
Learn how to make metalic tiles arranged in a randomly generated pattern.

Editor's Pick in Photoshop Tutorials, May 2005
While doing this tutorial, you’ll find yourself exposed to a plethora of Photoshop tools, including the liquefy tool, add anchor point tool, and pen tool.

Open a new document:
500x500 pixels will be very good.
Then download the shape from the attachment area.
Load the shape

This tutorial will aide you in transforming a flat design into a three dimensional packshot that is great for spicing up those product presentations.