Productivity
https://medium.com/the-mission/the-7-best-podcasts-of-december-2017-1ead17b73f68
https://medium.com/personal-growth/how-to-achieve-more-than-you-think-you-can-44e99f000ffa
https://medium.com/personal-growth/self-improvement-has-made-me-worse-a4cc23e93e7a
http://sethgodin.typepad.com/seths_blog/
https://en.wikipedia.org/wiki/Stoicism
https://www.youtube.com/watch?v=9QiE-M1LrZk
https://www.youtube.com/watch?v=_SzvtJMrXx0&feature=youtu.be