JUNK MAIL Even though I try to unsubscribe from the list I still get Junk Mail?

United States
March 16, 2009 10:55am CST
junk mail sucks - This cartoon explains exactly how i feel
When you received junk mail do you unsubscribe from the companies mailing list so you won't received the email again. I try and do that some times but still get the same email again. Its so frustrating is there any thing that I can do so I can get less junk mail?