How can one nurture sales team to develop best marketing practices in order to become more productive?

In my opinion, the best practices begin when they are directly linked with vision and mission of the organization. The sales team needs to align its activities which not only support the vision and mission but are also in alignment with CSR, to firstly have a common goal across the company.

The management needs to gather timely feedback from its marketing team and also make necessary changes and strive to provide a wellness environment for its employees to maximize production.

Good leadership, friendly communication with team, opens discussion. Appreciate the team member’s performance.   Address or rewords members achievement in acceptable way  

A freindly Sales CRM System, Arming the sales force with adequate communication system, Quality leadership, minimize time spent on administrational and desk duties,  engage them with timely training and best practices sharing , Performance tracking on a periodical basis and highlight the area of development.. all are very much essential 

Obviously, the main point is introducing incentives. Besides that start improving morale and team spirit.