If you work with an accountant, mortgage broker, car dealer, real estate agent, or any other professional that sends you leads on a regular basis make them feel special with a custom referral form just for them. Give them a custom URL with their name, put their picture on it and ask only the questions on the quote form that they usually know the answers to. You could make this page hidden so only they can find it or make it public and encourage them to send customers straight to their custom quote form on your site.