adobe photoshop - How can I create realistic business card mockups?

I'm trying to produce the effect in the below image:

I'd preferably like to do this with Photoshop or Illustrator. How can this be accomplished?

Answer

The quick and easy solution is using a PSD mock-up template. There are a lot of options available on Pixeden, such as this free one: Psd Business Card Mock-Up Vol 1

I made this in Photoshop using that template:

Here is one that is available for purchase that is a little closer to the one you linked: Psd Business Card Mockup Vol7