It's not only what you do, but when you do it! Many sales are lost because the seller tries to close way too early!
Impatience and inexperience are the two main culprits. The latter is excusable, but impatience is simply poor or lazy selling.

Closing "on the night" is vastly different from closing "too early". Discover how to recognise the precise moment to close the sale - the "closing window". If you miss it, you'll probably kiss goodbye to your chance of closing the sale!