Photoshopping The Rule Of Thirds

I know that I keep going on about the rule of thirds like some fervent preacher but I just cannot stress how useful a tool it is to improve your photographs.  I thought that I would just post a 'how to' provide yourself a handy nine square grid in photoshop.

First you'll need to go to the menu File -> Preferences.  A dialog box should now appear.  In the 'Gridline every' box about halfway down the dialog box you should enter a value of 33 percent.  Click on Ok to accept the change.

Now, if you go to the menu View -> Show -> Grid a grid should appear over your photo helping you with your composition.