The best way to write a business proposal is to be in good communication with your customer. Knowing there wants and needs is something you can add into your proposal so that they know that you are on top of there wants and wishes. Also be sure that when writing your proposal you can answer their questions. There is no standard form or layout that is required for your business proposal. A site
. that has some sample business proposals is http://sbinformation.about.com/od/bizlettersamples/a/write-proposal.htm.