I literally use this every time I make a layout. It is phenomenal and makes saving your layouts so much easier. And best of all, it's FREE. Fiddle Dee Dee Designs has created it and offers it free on her blog. But grab it quick, I'm not sure how much longer she is willing to offer it. Also, don't forget to leave her some love. It's such a remarkable action for photoshop. You can go to her blog by clicking here or the image below.