I have given some important tips to avoid spam.
1. Never allow your email address to be posted or listed on a publicly available web page.
2. Never ask to be removed or attempt to unsubscribe from a spammer's list
3. Never open or read junk emai.

4. Avoid contests, special offers, free offers, and chances to win -- anything
5 .Never post to a newsgroup or email list using your private email address
6. If you are a contact for a registered domain, do no list your private email address, instead use a generic common mailbox for this purpose
7. Guard your computer against trojan spyware software
8. Use a free Yahoo or Hotmail account as your public email address

9. If the junk mail level has gotten out of hand in your Inbox, consider changing your email address