1. Twitter via Twitter lists using Feedbin: https://feedbin.com/blog/2018/01/11/feedbin-is-the-best-way-...
2. Email newsletters via RSS (also thanks to Feedbin): https://feedbin.com/blog/2016/02/03/subscribe-to-email-newsl...
3. HN via hnrss.org[†]
4. Reddit via subreddit RSS. (Just add .rss after the subreddit: https://www.reddit.com/r/golang.rss )
5. A small selection of hand-curated blogs and friends' sites.
If the firehose ever seems too overwhelming (>200 new items), I generally just skim the titles for stand-out items and then mark all as read guilt-free.
[†] For example:
- hnrss.org/newest?points=50
- hnrss.org/whoishiring/jobs/?q=React
- hnrss.org/replies/?id=youruserid