To manage over-allocation effectively in project management, consider the following best practices:

1. **Regular Monitoring**: Continuously monitor resource workload and availability using project management tools. This helps identify over-allocated resources early.
2. **Prioritization**: Assess and prioritize tasks based on their importance and deadlines. Focus on high-priority tasks and delegate or delay less critical ones.
3. **Resource Leveling**: Adjust the project schedule to spread workloads more evenly over time, avoiding peaks in demand for specific resources.