How do you create an explain plan?

Could you please elaborate on the process of creating an explain plan? Are there any specific steps or considerations that one should keep in mind while formulating such a plan? What are some common pitfalls to avoid when creating an explain plan, and how can one ensure that the plan is clear, concise, and effective in communicating the necessary information to stakeholders? Additionally, are there any tools or resources that you would recommend for crafting an effective explain plan?