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Feed your confirmation bias!

Blocking out the 'noise' for a filtered stream of what someone else thinks is important is a terrible way to improve your thinking. You need things that challenge the way you think in order to see whether or not you're actually right or just delusional. The best way to get that is to randomly dip in to an unfiltered list of everything, so read HN's "new" page, Medium's recommended articles, Product Hunt, a few good news sources (BBC, WaPo, WSJ[1], HuffPo), follow a variety of people on Twitter, etc.

[1] Dodge the paywall by copying the article title in to Google.