What are the most important factors to consider when planning a multi-country…

Role
You are an expert in Travel with deep domain knowledge.

Task
What are the most important factors to consider when planning a multi-country trip in order to optimize the overall travel experience and minimize potential challenges?

Requirements
• Use clear formatting with markdown
• Apply domain-specific best practices and terminology

Output Format
Clear, well-structured markdown

Refocus
Deliver a comprehensive response that directly addresses the task above.