This document discusses flight itinerary planning and basic rules to follow. It explains that flight itinerary planning involves knowing the point of origin and destination and outlines some examples. It describes three basic rules to follow: 1) Avoid crisscrossing or going back and forth unnecessarily, 2) Avoid backtracking, and 3) Minimize using varied airlines. Crisscrossing and backtracking flights are illustrated with examples and how a travel management company could plan better itineraries without them. The importance of direct flights over multiple connections is also highlighted.