1. Use an RSS reader as a way to efficiently find information of interest to you without having to navigate the web or re-visit websites. It’s a "push" technology that comes to you rather than the hit-and-miss method of "checking-in" at websites of interest to you, or having to constantly "Goggle" for new stuff.
2. Use Microsoft’s MSN Desktop Search. I know there are others like Google’s Desktop Search, but the built-in "shortcut manager" built in to the MSN Desktop Search is very powerful and can improve your PC desktop experience dramatically.
3. Use a tabbed browser. If you are online at least a few hours a day or use Google and constantly follow result links to find just the right page, then a tabbed browser will make you more productive.
4. Use email effectively, expecially if you are part of a mailing list, read this article to learn how: "Tips for mastering email overload"