Some pointers from someone that deals with large and small organizations.

- Expect to be audited both security wise and financially. - The larger the organization, the longer the process. (Although smaller clients can be just as dysfunctional.) - Track everything; email, phone call, meeting, etc. It will save your ass in a dispute and may provide valuable metrics. - The customer isn't always right, but they still are the customer. - You will have to fire customers or crank prices up so the pain isn't so bad.