Even as the Web has become more entertaining — and certainly better looking — over the past 15 years, it has also become much more useful and practical, as the 100 sites in this feature will demonstrate.
I've organized the sites in the list by the type of task they help you with. It is not a ranking; in each category I recommend sites that specialize in a different area than the others. I've also mixed in a smattering of sites that you might not use every day, but that provide ready answers to specific questions like "How can I learn to rumba?" or "Who should I vote for?" or "How do I make a wallet out of duct tape?"