Looks like almost all of my personal rules have been covered already. Here are a few that I didn't see mentioned
No solid color silk pocket squares
No dimples in ties - I work with an impecabbly dressed older gentleman that never has a dimple, I am not ashamed to admit that I started copying him
Rubber soles or topy only on dedicated rain shoes - I dont care what anyone says about sole material not affecting breath-ability, my feet get clammy with non leather...