Absolutely all of the above and beyond. Take it into your own hands & learn all you need to be taken seriously.
I work mostly from a local develpoment environment, along with having MySQL installed, Git, PHP, etc. I keep records of all of my practice, study notes, projects, I even keep records of all of the topics which I provide extensive answers to on codecademy. Most of the topics I answer here have actually given me great source material to build my own reference/documentation on my own website.