Need some advice on composing casual and business cloths for a man. Additional need: travels a lot?

Casual: First think where you are going to. Check the weather reports of the area first. Medium weight black denim pants, long sleeve turtlenecks, quarter zip-up flannel jackets. Light weight full fingered black cloth gloves work very well. Business: Dark Grey suits are very forgiving of food mistakes. Silk or good wool work best. Don't go for leather tie in Japan or Germany or Israel. It's not a good idea.