Guidelines (Golden Rules) to write business letter

Following are some of the guidelines a writer has to remember while writing a business letter:
• The purpose of a business writer is to sell but not to tell.
• He has to prepare his content in such a way that it must influence the reader to buy the product.
• Do not give poetical descriptions about the product.
• Give the utility details, the details that provide the reader some utility
• Do not mention technical details unless it is compulsory
• Explain how your product is superior to the products of yours competitors
• Mention about the price of the product only at the end
• Mention some testimonials you received from your clients and customers