I only recently launched it, but I think http://flippinawesome.org is turning into a good resource (of course I am biased).

I also agree with the folks about the weekly newsletters. I subscribe to HTML5 Weekly, JS Weekly, CSS Weekly, Web Design Weekly and RWD Weekly (among others). 

However, my primary source would be via RSS. I have a NewsBlur feed (now that Reader is dead) with probably hundreds of different sites. Granted, I am voracious reader of this stuff.