As someone who went thru 10+ years of corporate sales before becoming more technical, I can recommend a couple of books that are going to do the job for you - I built a career on the frameworks offered by them:
- SPIN Selling, Neil Rackham [solution based selling is very important]
- Major Account Sales Strategy, Neil Rackham [if you're going to work with Fortune 500]
- Rain Making: Attract New Clients No Matter What Your Field, Ford Harding [that's a classic, but it's a little bit not in line with selling tech, although still worth reading, especially for biz dev]
There hasn't been ANYTHING new in selling for at least 30-40 years with an exception of the social selling trend, but that can be mastered rather fast over the net.
Yes, it's really that simple. Learn, apply, pivot. Repeat. You'd be surprised how many account / biz dev managers never had a chance to read. Therefore they speculate about "intuition" and "talent", which are obviously BS. Master the process and you'll shine (and your head is going to forever free from thinking endlessly if you could have done something better).
I wish you luck.