I made the "mistake" today of catching up reading some of my old feeds in Bloglines. It's a delicate balance, discerning "useful input" from "interesting distractions," and I think today I fell into the latter for at least a good 30-45 minutes or so. On the other hand, so often these "currently-seem-like-distraction" inputs and ideas turn out later to be keys that open doorways into hugely-effective new ideas / ways of thinking. As I write this, I'm picturing the old sluice boxes used in placer mining. How much informational "unconsolidated gravel" is the ideal quantity for the creation of "wealth"? Definitely an important question in the management of Primary Resources (e.g. in this case, managing one's own attention, which is basically just a fusion of the Primary Resources Energy and Time).
So, that caveat out of the way <g>, if you're a geeky/logical/mathematical type looking for some interesting brain food, check out Bram Cohen's blog. (Just FYI, in case you don't know: He's the inventor of BitTorrent). Lots of diverse thoughts, from a guy who obviously thinks a lot.