The 960-grid system is an effective way to start your web design layout n Photoshop. You can use the grid as a guide over to help you build rows and columns that are consistent in dimensions and spacing. I don’t believe that all web site designs should follow a grid system, however, the grid is a great tool to keep around.

You can see live site examples at http://960.gs. Drupal has also produced a new implementation of the original grid located here http://drupal.org/project/ninesixty

Download and unzip the framework from the http://960.gs website