Here where the Internet is a big help.
Only a year ago you had to buy CD-ROMS packed with names and addresses if you wanted to search the telephone books of the entire country. Now you can do it fast and free on the Internet.
Some of of the best address and e-mail locators: InfoSpace at http://www.infospace.com/ will get you the national phone directories for people and businesses. Also, fax directory, blue pages for government along with maps of each listing.
Four11 at http://www.four11.com/ is good source of e-mail addresses.
Also check Switchboard at http://www.switchboard.com and Bigfoot Directory at http://bigfoot.com/ which also works in French, German, Italian, Spanish and Japanese.