RSS feeds...
LOVE them. I can't remember when I started using Google Reader, but it's made life so much easier since then.
I checked this morning and I am up to 134 subscriptions (is there a support group for this?). But I've got everything from knitting and hockey blogs to celeb twitter accounts (fun fact: you can follow public twitter accounts from your RSS reader without actually joining twitter!), webcomics to the latest entertainment news.
Del.icio.us and social bookmarking, I am less familiar with. I can certainly see the benefits of it, though, especially in the library environment. If easy access to information is our bread and butter, then Del.icio.us is a waiter bringing you more of those wonderful breadsticks at the Olive Garden. Or something like that, haha. Anyway, the username over there is
jessb83.