This is not an exhaustive list. I'll keep this post updated as I add new useful links, so if you discover a useful RSS URL trick then feel free to add it to the comments.
Just for the sake of examples, I'll use "korea" as my generic tag name, so just replace it with whatever you're looking for.
Bill Maher's Realtime blog (just his commentary - no guests/video fluff)
- Main URL: http://www.real-time-with-bill-maher-blog.com/
- RSS URL: http://www.real-time-with-bill-maher-blog.com/index?format=RSS&category=COMMENTARY
Joel Osteen daily devotions blog (just posts, no fluff)
- Main URL: http://www.joelosteen.com//Blogs
- RSS URL: http://www.joelosteen.com/Views/RSS/Feed?ct=2&cst=2
Website tag/category feeds
Medium tag feeds
If you like subscribing to podcasts but don't use iTunes, it's sometimes hard to find the right RSS feed to subscribe to. Here are a few that I like that were a bit hard to find. I subscribe to these podcasts in my usual feed reader, Inoreader.
"Art of Manliness" podcast
- Main site: http://www.artofmanliness.com/category/podcast/
- Podcast feed: http://feeds.feedburner.com/artofmanlinesspodcast
- Main Site: http://www.colbertlateshow.com/podcasts
- Podcast feed: http://feed.theplatform.com/f/kYEXFC/zVfDzVbQRltO
- Main Site: http://www.joelosteen.com/pages/podcast.aspx
- Podcast feed (audio only): http://www.joelosteen.com/Views/RSS/Feed?t=PodcastAudio&ct=CustomList&cst=Podcasts
- Podcast feed (video): http://www.joelosteen.com/Views/RSS/Feed?t=PodcastVideo&ct=CustomList&cst=Podcasts
Happy reading (or listening).