If you worked with Go quite a bit 3-4 years ago, but have been out of scene since then... what is the best resource(s) for getting back up to speed with its current state?

I presume that the language spec itself hasn't change DRAMATICALLY over the past few years. But so much is unfamiliar in the project structure / build process area (e.g. "vendor directories", modules, dependency managament, etc).

All the tours and tutorials focus on the language syntax and standard library. Looking for a refresher or intro to the "how do you actually get work done in the best manner?" plumbing aspects.