By: kelbytv.com/photoshopkillertips
Use guides to layout your design elements.
http://kelbytv.com/photoshopkillertips/2009/10/22/using-and-aligning-layers-to-a-guide/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+PhotoshopKillerTips+%28Photoshop+Killer+Tips+%28Video%29%29