I receive only spam/unsolicited emails in my yahoo account. i have reported all as spam. How do I stop this?

The only sure way to prevent spam is to not have an email address. However, one of the suggestions in the first answerer's list of things to do was to have a separate address. Getting an id approved through Yahoo isn't easy, but you can try for a new one, and this time, don't give it to anyone but your closest friends and relatives. This will help somewhat to cut down on the spam, but there is only one sure cure. No email at all.