How can spamming be reduced?

Question :

How can spamming be reduced?

 By using these precautions you can greatly mitigate what spam you do receive and prevent most spam from ever happening.

• Be careful where you enter your email at.
• Create or use disposable email addresses for websites you do not trust.
• Never open spam when you receive it.
• Keep your computer virus and malware free.
• If your friends are sending you emails sent to a large recipient list, request that they use BCC instead of TO or CC, so that other recipients cannot see your email address; or request they stop including you if you do not want to receive the emails.
• Do not list your email address on your website or anywhere the public can access it.