Ask HN: Where do you research tools/libraries to use for your projects?

There are new tools and libraries popping up everyday that look to improve developer productivity/experience.

For me, it's a manual process of scanning Twitter/Google/Podcasts/HackerNews/Reddit/Github Trending to stay up-to-date.

Interested to know what sites people use, and what their process is, and what pains they experience with this process.