Tongue in cheek answer: The best sales process is one you will consistently do! :)
I wrote a 335 page book on this topic...perhaps check out Seal the Deal. I'm not sure if it will answer your question, because you haven't shared what you're selling to whom, but maybe it will help? http://www.suzipomerantz.com/suzis-books/peek-inside-the-book-seal-the-deal/
