Sharon Drew Morgen is the real deal - and I am not someone who recommends just anyone.
As someone who has worked with hundreds of companies on increasing revenues, I was really blown away by Sharon Drew's upcoming book, called "Dirty Little Secrets - Why Sellers Can't Sell and Buyers Can't Buy and What You Can Do About It" - (I've just finished reading a pre-release copy) She offers story after story to back up her discussion and understanding of change management that help to determine any decision.
We do everything right as salespeople and business owners - value prop, good questions, and we think we have a fit with the prospect - then they don't buy from us and we don't know why. Learn why from Sharon Drew.
As business owners wearing the "sales" hat, we can all benefit from Sharon Drew's experience and expertise. I highly recommend checking Sharon Drew's website out http://www.sharondrewmorgan.com/, buying her book when it comes out, and reading her blog.