To manage poor planning effectively in project management, consider the following best practices:

1. **Define Clear Objectives**: Establish specific, measurable, achievable, relevant, and time-bound (SMART) objectives at the project's outset.

2. **Comprehensive Scope Definition**: Clearly outline the project scope to avoid ambiguity. This includes defining deliverables, tasks, and outcomes.

3. **Detailed Project Plan**: Develop a detailed project plan that includes timelines, resource allocation, budget, and roles and responsibilities.

4. **Risk Assessment and Management**: Conduct a thorough risk assessment to identify potential challenges. Create a risk management plan to address and mitigate these risks proactively.

5. **Engage Stakeholders**: Involve key stakeholders in the planning process to gather valuable insights and ensure alignment with their expectations and requirements.

6. **Regular Review and Adjustments**: Implement regular review meetings to monitor progress, reassess the plan, and make adjustments as necessary to stay on track.

7. **Utilize Project Management Tools**: Leverage project management software and tools for better visualizations, tracking, and communication among team members.

8. **Training and Development**: Provide training for project managers and team members on project management methodologies and best practices to enhance planning capabilities.

Implementing these best practices can help create a more structured and effective planning process for future projects. Would you like to dive deeper into any of these practices?