– and Rackham’s overall advice is to go after half the number of customers and shower them with twice the attention. Take five minutes and watch his insightful interview on Gazelles.tv (right hand column) - and then watch it again with your sales team (these interviews were conducted at the Sales and Marketing Summit a few weeks ago). BTW, Rackham shares an interesting stat — the top 10% of a sales force typically outperforms the bottom 10% by a 3:1 margin! This is where opportunity exists.