IME the key to closing a sale is to open it in a way that makes the buyer comfortable saying no. If you get them to commit up front to the idea that no is acceptable, even desirable, and that "maybe" is a waste of time (and really just a polite way of saying "no"), the "yes" will be obvious. Example: [At beginning of sales meeting] "I'm going to show you my product and I hope it's a good fit for you. But our product…
""I'm going to show you my product and I hope it's a good fit for you. But our product isn't a fit for everyone. So, if you decide that we are not a good fit, are you comfortable telling me no?""
Patronizing to tell anyone with a brain this. Might be good if you are selling home improvements to senior citizens though.
My advice to anyone (edit: who is reading HN, advice in a different forum might differ) who wants to learn how to sell is either to spend actual time in a sales job learning or if you can't do that spend time with experienced but not professionally trained salespeople and learn from them.