Power is not normally a concept you associate with pet sitters. After all, power-hungry people tend to own huge national corporations... or they go into politics. But you do have a peculiar sense of omnipotence over your clients' pets. You feed them, you serve as their bathroom butler, and you provide them with much-deserved attention and affection. So it’s almost like running for a seat in the House.
In another sense, however, you have no power at all. Your pet sitting schedule is driven by your clients' needs. If Fido must go out three times every day, by golly, you arrange your schedule so he can uncross his legs regularly. If a client wants mail and plant care services, you book a few extra minutes for those tasks. Whatever the clients need, they get with a smile. Remember, you do have the power to choose that cheery attitude.