2. Know It AllIf you don't know it all, at least know what you don't know.
4. peeping-domA method to record users' journeys on your site and play them back.
5. structures-demoDemo for https://hackernoon.com/the-100-correct-way-to-structure-a-react-app-or-why-theres-no-such-thing-3ede534ef1ed