Then, deliver your polished proposal. Save it in a PDF file or print it out, or both. The best delivery method for you depends on your relationship with the party who will receive your proposal. It's common to attach PDF files to email these days, but for your situation, it might be most impressive to hand_deliver a nicely printed and signed proposal.
Okay, now you've written the proposal. The finish line is in sight, but you're still not quite done. Take some time to make your proposal visually appealing. You might want to incorporate your company logo, use colored borders, or employ special bullet points and fonts. Just make sure that any added graphic touches match your style and the tone of your proposal. Don't forget to spell_check and proofread every page. For the final check, it's a good idea to recruit a proofreader who hasn't read your proposal before. It's way too easy to miss errors in your own work.