Benefits: All winning business proposals, clearly outline for the company the benefits to be gained from doing business with you. If your small business can offer complete confidentiality and meet tight deadlines state it in your benefits section.
Credibility: This is often the overlooked portion of a business proposal but all winning proposals glow with credibility. If you have worked with clients in the same field or have an award-winning business, then third-party endorsements will build credibility.
Samples: A business proposal with samples and evidence of your ability to deliver is vital to gaining the winning bid. A small sample of your work can show your ability to do the job.
Targeted: A winning business proposal is all about communication. Speak in a language spoken by your intended audience. If the proposal evaluators are from an engineering background or financial department use the appropriate jargon.
Ultimately, the best business proposal is none. When your company is well-positioned and unique in the marketplace then it is only you who can meet the needs of the company requesting the bids. If a retail craft chain is looking for a web design firm and your company specializes in web creation for the crafts industry you might be able to circumvent the proposal process.
In the end, you may not win all bids, but will win business that best matches your company to the prospective business. A win-win for all parties involved.