Ask HN: What does your development stack look like in your favorite language?

We are living in an incredibly time with respect to programming languages; the choices and diversity available are amazing. But it's often difficult to get up and running.

What's your recipe to get from a fresh OS install to the minimum viable development environment to do "real" work (not just a helloworld program) in your favorite language?

(include as much or as little detail as you want)