Sales mistakes may be inevitable but they're not unavoidable. Whether you are an established company or a startup, what you probably need most in this economic climate is a positive revenue stream. It’s possible with a higher-performing sales effort! You are not selling a great product or service that your company made—you are selling how a customer can change their lives with that product or service. Improving your overall sales effort is the difference between converting a prospect and losing them forever. These 10 cardinal sins of selling are barriers that stop prospects from improving their lives with your help!