Get the Summary of Stephan Schiffman's The 25 Most Common Sales Mistakes and How to Avoid Them in 20 minutes. Please note: This is a summary & not the original book. "The 25 Most Common Sales Mistakes and How to Avoid Them" by Stephan Schiffman provides practical advice for sales professionals, emphasizing the importance of dedication, discipline, and effective resource utilization. Schiffman, an active sales professional and trainer, shares insights on the sales process, stressing the need for salespeople to listen actively, understand customer perspectives, and build trust through genuine engagement...