blog addiction: tools of the trade

Here's a shameless plug for another google product - Google Reader. I subscribe to about 70 blogs at last count, and I've categorised them into little folders which I read daily in a specific order (just like I read my weekend paper. How could I ever bring myself to read News Review after Spectrum?) There are other things out there that I've never really got the hang of (StumbleUpon? Digg? Delicious?), so if anyone's willing to teach me, let me know!