General expectations
At the beginning of each new working relationship be sure that basic expectations are clear. You have expectations you have of the personal assistant (PA). The PA has expectations of you as an employer. Review the expectations from time-to-time to be sure they are being met by both of you. When you review the expectations see if any changes need to be made.
You want a smooth working relationship. To have one, you need to establish clear expectations for the working relationship, working style, and job duties from the very beginning. In addition, the worker has the right to have expectations of you as an employer as well. It's a two-way street.
Time Management
How you manage your time is important. You may have a variety of tasks, errands, appointments, a job or social activities to attend to. On the other hand, you may not have any specific time constraints. If your daily schedule has no time-specific appointments scheduled, you may feel that you can be freer with how and when you schedule the work to be done. Even so, it is important for you to manage your time and that of your personal assistant (PA) in an effective way that allows you to do what you need to do, on time, when you need to do it.
Job Duties
If the worker is unsure of what you want as the employer and how you want certain tasks done, it will be difficult for both of you. Understanding your needs and expectations will make the worker's duties easier to do. Established routines and schedules for daily, weekly, and monthly tasks are important.
Explain to the worker how task checklists can be used to remind you both of what needs to be done and how to tell when a task is completed. If there are certain times that a task needs to be performed, your worker must be informed, it helps to note specific times on the task list.
Source: pascenter.org