Can you tell me if i had but six months to live, what would i do?

Below: As you stated in your own question, it is something only you can answer. No one can answer that for you. What have you always wanted to do? What have you regretted not doing? What would give you meaning and purpose for the time remaining in your life? Not even your family can answer that. Take some time and review your life, your dreams, etc to come up with a list.

Why are you asking?: Has someone told you this? Are you asking on behalf of someone you know? Dr. Bansai's answer is the right one. Although being sure tell people that matter you love and.or respect them is good for all.