The first thing to place is the beer box. Build your shop around that. Don't forget the 42" Plazma with suround sound. The next thing to get is a dead bolt lock so that the wife and kids can't stick junk in your shop.

For the serious side when you build it put plug ins every 4' you can never have enough outlets. Plan where you want your 220V at (welder, compressor and or a lift. If you are building a new shop think about a floor drain so that when you clean the floors or wash your ride it is not a mess. Put enough light to do surgery (no such thing as to many lights) If you are like me I spend way to much time in my shop so an overhead fan keeps a nice breeze unless your painting.

Before you decide on a layout think about running hard lines with drip legs for the compressor.

Did I mentiom a BEER BOX?

A mans shop is his castle