To effectively manage inadequate governance structures in project management, consider implementing the following best practices:

1. **Establish a Clear Governance Framework**: Define the project governance structure, including roles, responsibilities, and decision-making authority. This framework should align with organizational strategy and ensure that there are clear lines of accountability for project outcomes.

2. **Engage Stakeholders Early and Often**: Involve all relevant stakeholders from the beginning of the project. Create a stakeholder map to identify who needs to be involved in governance and decision-making.

3. **Regular Communication**: Set up regular communication channels and updates to keep stakeholders informed about project progress, changes, and decisions. This transparency helps in gaining trust and ensuring alignment.

4. **Define Governance Processes**: Establish clear processes for project initiation, planning, execution, monitoring, and closing. This includes setting up approval processes for critical project milestones and changes.

5. **Utilize a Project Management Methodology**: Adopt a recognized project management framework (like PRINCE2, PMBOK, or Agile) that includes defined governance structures and practices. This can provide a solid foundation for managing projects effectively.

6. **Create a Governance Board**: Form a governance board or steering committee with representatives from key stakeholder groups. The board should meet regularly to review project status, align on strategic objectives, and make critical decisions.

7. **Regularly Review and Adjust Governance Structures**: Continuously assess the effectiveness of the governance structures in place. Be open to making adjustments as necessary based on lessons learned from the project and changes in organizational strategy.

8. **Provide Training and Resources**: Ensure that team members and stakeholders are trained in the governance processes and the importance of accountability. Provide resources to support effective governance practices.

9. **Implement Risk Management Practices**: Establish a risk management plan that includes governance-related risks. Regularly review risks and their impact on governance and project alignment with strategic goals.

10. **Leverage Technology Tools**: Use project management software that facilitates governance by tracking progress, managing documentation, and supporting communication among stakeholders.

By implementing these best practices, you can strengthen the governance structure in your projects, ensuring better alignment with organizational objectives and enhancing the overall project success rate.