vvalkyri points us to turnberryknkn in a particularly poignant post on the importance of the first few minutes after cardiac arrest. If you don't know CPR, learn it already. I did, it's not hard, and even stale knowledge is better than none.
Every one of his posts I have so far looked at has been an absurdly engaging read. Start anywhere: as all righteous web pages (but few blogs) do, his posts link to each other in relevant contexts.
...and he's very good about linking to other posts of interest, like this one on abortion and the man with no spine, which found its way to me previously I'm not sure how, but presumably the same way.