Here are some resources and organizations to which I either belong or subscribe but more importantly, participate! Any one of these would be a good investment of your time and resources to broaden your understanding of the ever-changing sales environment.
Selling Power is the most trusted site for professional selling skills, motivation and sales management know–how in the Sales 2.0, B2B environment. You can see their blog feed in the margin of my home page.
The Sales Management Association is a global, cross-industry association serving sales leadership and sales force support professionals. Members include sales leaders at all levels within their firms; sales operations or sales force effectiveness management; training and development professionals responsible for sales management domains within their organizations; and other sales support professionals.
The AA-ISP is an international association dedicated exclusively to advancing the profession of Inside Sales. The association engages in research studies, organizational benchmarking and leadership round tables to better understand and analyze the trends, challenges, and key components of the growth and development of the Inside Sales industry. Our mission is to help inside sales representatives and leaders to leverage our information and resources through published content, local community chapters, national conferences, career development, and an Inside Sales accreditation program.