Sometimes you decide that you want to change your font but need to select edit several different layers in your file. If you have several layers this could take some time.
Here is a neat trick. Select all of the layers that you want to change the text on.
Make sure the Text tool is selected then change the font in the drop down menu. All layers change to the new font.
Just when you thought life couldn't get any better give this a try.
Make sure you have all your text layers selected. Select the font box in the Option palette. Now, by just using the up and down arrow keys you can run through the font styles right on your working canvas.
You can even change other attributes like the size of the text this way too. Now you have more time to do other Photoshop tricks.