I recommend subscribing to Steve Pavlina’s blog.  He recently posted two fun articles on 33 Rules to Boost Your Productivity volumes 1 and 2 (66 total).

His first tip "Nuke it" gives you a flavor of the list.  (I call this one "Purposeful Abandonment"—it’s an essential productivity tool—always asking yourself, "If I didn’t do this at all, would anyone notice?")  There isn’t really any new thinking here (it’s a compilation of common tips in book report style he’s titled something different), but it’s a good summary.  Not all of his tips will work for you, of course, but approach it like a cafeteria: take what you like and leave the rest.