You will need
- - access to the Internet;
- - registration on social networks.
Refer to the social networks of the Internet, such as "Classmates", "My world", "Vkontakte", "Twitter", etc. some Internet user today is not at least one such community.
To locate the particular person you need to register for any of these resources. After authorization, click on the tab "find people" and type in the proposed line of the name and others that you know the data about the person.
If you find his account, then write a letter to your friend asking for his email address. On some services e-mail appears at the bottom of the page when you hover your mouse over the photo of the user.
Enter the details of your friend (name, surname) into the search line of your program browser. If a wanted person anywhere on the Internet has posted similar information about yourself (your e-mail), you will get it.
Browse through the different sites, web page, forums, where your friend may leave your mail address. It will have to spend some amount of time, but it is likely that you will find the information you need.
Refer to your common friends, if any, and ask for the email address of the wanted man they have. They may be able to help you with your problem.
If your friend is the face of official or do you know his place of work or study, go to the website of the institution, see the section "Contacts", perhaps, any information you find there.
Think about quite carefully to numerous suggestions on the Internet to find information about a person by his name. Most are paid services. Even if it says that sending sms messages (to get activation code or anything else) totally free, check this information from your mobile service provider.