Coindesk/BitcoinMagazine, /r/bitcoin, and Twitter seem to be the most active options from what I can tell!
- Since there doesn't seem to be one place that's the best to keep up with everything, Twitter is my go-to for all crypto news. I would definitely follow the 3 you mentioned but more importantly, find the thought leaders in the field and follow all of them. That way, you'll get articles and blog posts from many different sources. Making a list of all crypto and blockchain related accounts is the best way to do it!