It's best to try as many of these as you can. Try with your name first and see how many return an address. Some may not list you, some will give different addresses.
Most people have more than one email address so keep on searching.
Find home pages, email addresses, companies on the net, yellow pages, phone numbers and addresses, etc. Search Usenet newsgroups. Search mailing lists, too. Find topics, search for people's postings by email address. Plenty of possibilities.