Final answer:
Goldratt recommends making a task on the critical path your highest priority to ensure that it is completed on time and does not delay the entire project.
Step-by-step explanation:
When you have a task on the critical path and it's time to complete it, Eliyahu M. Goldratt's Theory of Constraints suggests that you should make completion of the task your highest priority. This is because tasks on the critical path directly impact the project's overall completion time. If these tasks are delayed, the whole project could be delayed as well. In such cases, it is advised to ensure all necessary resources are available and to focus on the task diligently until completion. It is also important to immediately assess whether the task can be completed by the due date and take proactive measures to address any potential issues.