There are great blog posts available on how to create projects to build up a data science portfolio. I recommend this one by Michael Galarnyk and this one by Conor Dewey.
Unfortunately, this approach doesn’t work for me right now since my day job is very time-consuming. I need to iterate faster and on smaller subtopics depending on changing demands. I tested many different ways to achieve this. I finished several Udacity nanodegrees, worked through courses on Coursera and Udemy, attended Webinars and read a bunch of O’Reilly books.
Author: Timo Böhm