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

1. **Define Clear Objectives**: Clearly articulate the project's goals and objectives from the outset to ensure everyone understands what needs to be accomplished.

2. **Develop a Detailed Project Plan**: Create a comprehensive project plan that outlines the scope, timeline, resources, and tasks involved. This should include a work breakdown structure (WBS) to identify all deliverables and tasks.

3. **Engage Stakeholders Early**: Involve key stakeholders during the planning phase to gather their input and ensure their expectations align with project objectives.

4. **Assess Risks**: Conduct a thorough risk assessment to identify potential challenges and mitigation strategies. This can help prepare the team for unforeseen issues.

5. **Allocate Resources Wisely**: Ensure that resources (people, budget, tools) are allocated appropriately, taking into consideration their availability and skills.

6. **Set Realistic Timelines**: Establish timelines based on a realistic assessment of the work involved, historical data, and team capacity. Avoid overly optimistic timeframes.

7. **Regularly Review and Adjust Plans**: Implement regular check-ins and review sessions to assess progress against the plan. Be willing to adjust plans as necessary based on feedback and changing circumstances.

8. **Utilize Project Management Tools**: Leverage project management software to help plan, track, and communicate project progress. Tools can assist in identifying bottlenecks and improving overall visibility.

9. **Continuous Training and Development**: Invest in training for the project team on best planning practices and tools to enhance their skills and effectiveness in future projects.

10. **Learn from Past Projects**: Conduct post-mortem analysis on completed projects to identify what went wrong in the planning phase and document lessons learned for future endeavors.

Implementing these best practices can significantly enhance planning processes and help mitigate issues related to poor planning in future projects. Would you like to discuss any specific practice in more detail?