Go to -->File-->New--> Then change the pixels value to inches (i.e,Width & height ) pick ur default resolution (in which u work the most) and if u want some more changes u can do that.Now at the right just below the "OK" and "CANCEL" button their is another button "SAVE PRESENT" click it and save ur present attributes.And then press ok. This is all What I do. Save Present is for saving the specific value for later use. I use Photoshop CS.