This is going to sound way over-simplified, but that’s okay. The way to avoid a sales wreck is the same way you avoid a crash on the highway: Avoid distractions, pay attention to the highway signs, and follow the rules. In sales, you and the client establish the rules early and often (this is called contracting and partnering). But you also have to avoid distracted selling, and pay attention to the signs your prospect or client is giving you. Even when you’re supposed to be the one who’s presenting.
You would never get almost all the way to your destination, and decide it would be okay to stop steering your car. You can’t just focus on the instruments of your dashboard and hope to arrive alive; you have to keep your eyes on the road, and even drive for the other guy, at times, to make sure you get where you want to go.