Javascript
I use Javascript everyday. I think it's a great language for letting ones own programmer creativity run loose due its accessibility and how mutable everything is.
Node
Node is what I reach for anytime I need to quickly manipulate a filesystem. I think any Javascript developer will eventually start to feel limited by the browser and will need to venture to Node.
Git
I embraced Git from the start and I have experience working with others on Github and Gitlab. I can't imagine being a programmer without Git. I've been saved many times from it. I use it for nearly all my probjects.
HTML
I learned HTML when I was just a kid. I would make very basic web pages. So when I began my programming journey, it was something I didn't have to work too hard for. I know enough HTML for my needs and any more is just a quick google away.