Your PR consultancy is a partner rather than an employee. Mutual respect is the crucial tie binding the two parties together to achieve rewarding results. There are a number of points that may help you maintain a harmonious and productive relationship with your PR partners:

Trust:
Trust your team's professionalism and be open to differing opinions that may even contradict what you expect. The good consultancy is not the one to follow your instructions slavishly, but the one that dares to say "No" to impractical instructions.

Unity:
Granting information access to your PR partners is of top importance. It will be very motivational if all parties within the organization are willing to work together with your PR team. It is impossible for the team to work without information and assistance.

Communication:
Do conduct regular meetings with your PR consultancies. Keep them informed of the company's news and include them in the mailing list of your organization's newsletters, new creative, research reports, etc. to inspire them in creating new ideas for PR leverage. Let them do the thinking for you and maximize the publicity generating possibilities that arise.

Timely payment:
Settle payments quickly to ensure a smooth work flow. Delayed accounting procedures may adversely affect the relationship between consultancies and their suppliers, which in turn will impair your company's relationship with the consultancy.

Of course, a sincere "Thank you" note will make everyone servicing your account happy and even more productive!