Nolo Press has a book with some standard boilerplate contracts in them. http://www.nolo.com/products/consultant-and-independent-cont... They are a decent starting point. Sometimes a client will take my boilerplate, or sometimes they will have their own. I'm ok using theirs after I have a lawyer read it.

Whoever wrote the contract will have the advantage. Even the Nolo book provides each contract written from the perspective of the client vs. consultant -- keep that in mind.