After 20 years and 10,000 deals, I’ve seen some great attempts at closing a sale. I’ve also seen some very bad ones. Of course, those bad attempts resulted in losing the sale. But many times there is just as much to learn from someone who does it completely wrong as there is from a pro. Set aside your training guide and meeting notes for a second, and let’s look at seven sure-fire ways to lose your next sale. 1. Don’t…