Non-programmer here. I've gotten great advice on work and links to great resources that have helped me change the way I work. It's not an overstatement to say that great writers like patio11 and Zach Holman have thoroughly changed how I see work, collaboration, and how it should interface with my private life. I don't run a SaaS app (yet) and I certainly don't make open-source contributions, but the principles of their posts can apply to a lot of fields that aren't purely technical. In the last year and a half since I started regularly reading I brought a lot of great ideas to my previous employer and then changed my career for the better.

tldr: Everything I've read here has given me immense clarity in how I personally view life and work, and I'm happier for it.