If you liked Thomas's (tptacek) advice, look up Patrick McKenzie's blog (http://www.kalzumeus.com/), particularly the post titled "Don't call yourself a programmer":

http://www.kalzumeus.com/2011/10/28/dont-call-yourself-a-pro...

He also has an e-mail list, and other training:

https://training.kalzumeus.com/newsletters/archive/consultin...

I believe there are several other resources focused on the non-technical side, I'm not sure how to separate the signal from the noise however :)

* tptaceck advice: https://news.ycombinator.com/item?id=12207015