I just start hammering holes in the wall and most of the time it works.  I like to just get it DONE, you know?  But there is nothing wrong with a little planning.  It’s just that in my experience as a recovering perfectionist, I spend all day overANALyzing and then don’t get anything done.  However, I think there is a happy medium.  I was just over at Pottery Barn’s website and found a helpful little video for hanging lots of artwork.