Mainstream newspapers, 4chan and Twitter. Between those, you get a broad array of stories both mainstream and wacko. It's important to look at the fringes but also pointless to avoid MSM (in my opinion). It's also much easier to recognize the author's or media outlet's bias if you expose yourself to everything.

I occasionally check out aggregators, but many aggregators are only aggregating stuff with their own bias, so it's not much better than doing the above.