When you're writing tests, you generally don't want to write to the database, email customers, and hit third-party API's. That's why we need to know how to mock dependencies!
Does the idea of submitting to a code review make you sweat bullets? Or do you brush it off as a necessary evil? It should be a (hopefully positive) conversation, wherein the team agrees to the code they're all going to have to help maintain, and maybe learns something new too.
How do you know when you've finally arrived, and are officially a programmer? Is it a set of skills, a certain amount of time? Can you ever really arrive, when it's a race of one with no finish line?
You've most likely seen word clouds before, like in the sidebars of blogs, even if you didn't know what they were called. Learn how they're made.. and how you can make your own!