Ruby on Rails is a great web app framework, but it's tough to learn for a front-end developer. These are the foundations to one part of rails I wish I learned more about sooner: the Models.
Testing is a topic I overlooked too much early in my career, which may have hurt my progress the most. This is everything I'd have told my past self about testing.
Another message to my past self, this time on the importance of accessibility, how to achieve it, and how to test it.
I write a letter to my past self about the Shell's importance I wish I'd focused on earlier in my career.