If you forget everything then here is a tattoo design, which would help you to remember who you are.
In case sometime you are killed in an accident or a bomb blast, it will be easy for your relative and police to identify you. I am not joking as this has been a case in many disasters and the relatives of the victims have to suffer lot of mental torture.
This tattoo includes all the identity info of Richard Charles who is a British Citizen.
Via: Primate Journal