One of the things I learned of what makes a person in sales a success, or not is execution in the closing part of the sales. For it does not matter in what you know, or how you prepare if you do not execute in crunch time of a sales that is in the closing part.
Being able to constantly persuade others to buy into your products, or idea is an art in itself. Its like an archer, that hits the bull eye by releasing his arrow at the right time. For hit its target should have nothing to do with luck, and closing a sale should have nothing to do with luck. Closing a sale should come down to executing a plan, that should have been planned long before it met someone to sale something to it.
Executing a plan to perfection is something that needs to be done, even though things do not go to according to plan. For plans need to be like bamboos, and not like oak trees. For an oak tree is stronger than a bamboo, but strong winds can knock it down. Whereas a bamboo tree goes back and forth in strong winds, but it still stands. Executing a plan to perfection must happen in the closing part of a sale, and it must be adaptable in all situations.
Therefore to close a sale, a person must have a mind of being the excellence of execution.