A good method to filter out arriving messages is to use plus-addressing in Gmail.
Instructions
1) Acquire a Gmail account.
2) Go to the external web site you would like to sign up for e.g. Facebook, Myspace, eBay or Amazon.
3) When required to enter your email ID, add a suffix of a plus sign and the name of the service. Add this to the ending of your name, just prior to the @ sign. For instance: JoeSmith+Facebook@gmail.com
4) Create a label in Gmail.
5) Create a filter and enter the same email ID you just used in the “To:” area.
6) Choose to label all messages sent to that ID.
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