Your policy must clearly define your terms, if this includes the customer providing all graphic and text material be certain to state it clearly.  Where you are willing to do consultation with a client, make certain that any fees that apply are outlined, as with any creation, photographic, or programming fees.  You must have a refund policy if you are unable to complete your obligations, and must state any portion to be paid as deposit, and if any amount is retained.  The same terms have to be determined for the possibility of customer cancellation.

You should also protect yourself from liability by stating that your client is entirely responsible for the content provided in the web page.  You cannot spend precious construction time researching whether content provided to you is factual or copyrighted to another person, and should not be responsible for typo's and other errors that were provided to you.  Where photos and other images have been provided, you must declare that you are not liable for posting of the images, or their content or subject matter.  You may even wish that your client provide signed release statements before posting images of people, products, or other potentially sensitive matter.