101 Most Useful Sites
Mail Sites

Track a Package: DHL Worldwide | UPS | FedEx | U.S. Postal Service
When tracking down a wayward shipment, there's no need to be at the mercy of an uncaring customer-service representative. Plug in the package's tracking number at its carrier's Web site and you'll see just where your most recent eBay purchase is today.

Look Up Zip Codes: U.S. Postal Service ZIP+4 Code Lookup,
The next time you're stuck on those last four numbers, consult the U.S. Postal Service ZIP+4 Code Lookup, a guide to nine-digit ZIPs . Plug in a business name or a street address to get its ZIP+4 code.

Shop for the Best Shipping Rate: InterShipper
If you're not wedded to a particular courier, shop your package around at InterShipper for the best deal. Plug in the package's details (such as weight, contents, and destination) and it tells you exactly how much Airborne Express, FedEx, UPS, RPS, DHL, and the U.S. Postal Service will charge to deliver the goods.

Have Your Mail Forwarded: MoversNet
Download a U.S. Postal Service change-of-address form from MoversNet when moving, instead of waiting in line at the post office. MoversNet also links to pertinent government agencies-such as the Internal Revenue Service and the Federal Election Commission-who like to keep tabs on your whereabouts.

Stamp Out Postal Waste: USPS Domestic Rate Calculator
If you've got a wad of stamps but don't know how many to slap on that novel manuscript you're about to ship off to New York, or on that scrapbook you want to send to Aunt Bessie, find out the exact shipping cost with the USPS Domestic Rate Calculator. Whether you're sending a postcard, a package, a letter, or an oversize envelope, you can get the rate here. Specify the origination and destination ZIP codes and the weight. Quicker than any human postal worker, the Web site returns to ask you about delivery mode (first class, priority, etc.) and other frills you might want-such as certified mail, registered mail, and insurance-before totaling up the final chunk of change.

Get the Right Address: National Address Server
Anyone who's received a misdirected package or letter knows how easily confused the post office can be at times. The National Address Server can't guarantee that your mail won't end up in the dead-letter office, but it can help you get the address as correct as possible in the first place. Enter as much of an address as you know, and the server will spit out an address with correct spelling, completed lines, and a ZIP+4 code. It will not, however, lick the stamp for you.