I use to mess with rss and agree with Marco on the purpose of them. Then I found a better solution, just subscribe to some of the awesome curated newsletters out there that do all this for you. HN has one - http://hackernewsletter.com and Peter Cooper's tech focused ones ( https://cooperpress.com/ ) keep you in the loop in a particular stack, plus a lot of others that I've seen. Now I don't have to check anything the…
How do the newsletter curators find interesting long-tail links?
For my part, it's a lot of browsing, including places like Hacker News and Reddit, and notably a lot of great things get submitted to HN but never get any votes.. those are always the coolest finds. There are also a lot of Twitter users to follow who produce content and tweet about it. I also get a lot of direct e-mails from people who create things, perhaps a third of links come via outreach from authors.. but that's the sort of thing that only happens after you've been doing it a while.