Eat healthy, stay fit, die anyway.
Life is short and unpredictable. If you dropped dead tomorrow would your family have the information they need to notify your friends and internet contacts and cancel all your online memberships?
You should write down (yes on paper) all the people you would like informed of your death on and offline, the sites you are a member of and all your names and passwords for all your emails, chats, etc. Keep this updated and make sure you tell someone you trust where to find it.

