I'm not an expert :D but what seems to be working for me, taking a lot of notes, looking back at failures for where I can learn. I try to do research on the p

I'm not an expert :D but what seems to be working for me, taking a lot of notes, looking back at failures for where I can learn. I try to do research on the prospect before I call. I think honestly trying to help the customer (and not just sell your solution) is important too. There's no replacement for practice... but in terms of books. "Spin Selling" by Neil Rackham was pretty good, and Dale Carnegies "How to win friends and Influence people" is a staple everyone should read.