It's wise to make a plan outlining which of the 700 plus cars you definitely want to see. This is best done by checking out some auto show previews and highlights, as well as the 2011 NAIAS Exhibit Floor Map.
You should also lighten the load. Since you will be doing a fair amount of wandering, touching and marveling, it is wise to check your coat ($3 + tip), but not your camera or bottle of water.

