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You may find this very abstract but from my experience I think it also boils down to what your life priorities are. Having clear understanding of your horizons of focus, as referred in GTD [1] will help in sorting out what is important to you and what is not.

I find it also important to maintain a wont-do list of things that are not important to me (and I thought they were).

Ex: I thought running marathon was important to me. Turns of semi-regular to gym is what is important to me. So any link/article related to marathon, extreme workouts/fitness that I come across is glanced and closed peacefully.

I think this will help you let go bulk of links without causing anxiety. HTH.

[1] http://gettingthingsdone.com/2011/01/the-6-horizons-of-focus