I also readr/Bitcoin on reddit. Yeah I know, it can be an echo-chamber at times, but it's a quick and very easy way of keeping up to pace in the Bitcoin ecosystem. Reading the top comments is a very valuable thing, as well. There are often people calling out blatant mistakes of an article or a specific claim. That way you don't believe everything and the chamber gets a little less echo-y.

I check Coindesk daily first, then use Bitcointalk as a backstop to catch breaking news or more minor stuff. Lately I've also been checking out Cryptocoinnews more often as well.

bitcointalk like others.

i usually goes to coindesk to read related bitcoin news and also reddit. this forum also have nice information related to bitcoins too..

google alert for word "bitcoin"

Coindesk, the forums, reddit, all great sources.

Youtube, twitter, http, rss, etc. aren't sources they're channels or mediums of media. They're ways to consume news but they don't create it. Sources would be Coinbuzz.com, Coindesk.com, which can be found on the web.

Cryptocoinnews is a great site for all things crypto https://www.cryptocoinsnews.com/ and of course for Bitcoin, the forum here is definitely one of the best, check here for important announcements https://bitcointalk.org/index.php?board=87.0
It's also a good idea to follow a few crypto centric Twitter accounts like @coindesk and @CoinTelegraph.