The best advice I ever received about contracts, "Contracts are for lawerys, and when dealing with the rich, they can afford a better lawyer than you."

The best when to win in court is to keep out of court. Keeping a client happy and being honest is the best defense. Contracts are a good idea, generally only the most obnoxious guy will take you to court and then becuase he can win. You will recognize hime in the first meeting and the smart money is to pass on his job.