Self-belief alone is not sufficient—you also have to be able to convince other people of what you believe.

All great careers, to some degree, become sales jobs. You have to evangelize your plans to customers, prospective employees, the press, investors, etc...

http://blog.samaltman.com/how-to-be-successful

Other parts of the post resonated with me, and this one does too, as something I want to work towards as I build my company.

Looking online, all advice on "sales" is centered around actual sales scenarios, rather than what Sam is referring to. I was wondering if anyone came across any books etc. or had good advice on where to start with "getting good at sales".