I'm becoming an acolyte of this classic tech. It's a fantastic way to bridge the internet with the simple life.
That said, it can be tricky to find RSS feeds with any consistent methods. I'm curious if there are some go-to feeds or archives out there.
Arguably the #Junited2005 thing this month has been about finding good blogs etc; most seem to have RSS.
My most reliable way to find feeds is to read things here. Then if I like the article I subscribe to the blog.
Well, every subreddit is an RSS feed (ex: http://reddit.com/r/artificial/.rss) so if you have a favorite sub or two, you can follow those in an RSS reader.
Likewise, there is the HN RSS feed: http://news.ycombinator.com/bigrss
Also, all arXiv categories have RSS feeds associated with them: https://rss.arxiv.org/rss/cs
and you can also do individual subject classes within a topic:
https://rss.arxiv.org/rss/cs.LG
But of course if you're asking about my favorite feeds, I guess I'd have to say "my own". :-)
http://philliprhodes.name/roller/blog/feed/entries/atom
https://www.fogbeam.com/blog/fogbeam/feed/entries/atom