Given the way my luck generally goes, the lifeboats would probably be full by the time somebody told me where the hell they are. So, let me see. I'd carry a concealed weapon everywhere I go if I could, so for the sake of argument, let's say I did. Smuggling a handgun onto a boat in 1912 probably wouldn't be too difficult, assuming sidearms were a thing in that era (I don't know much about the history of firearms). So, when the lifeboats are full and my death is guaranteed, a single bullet in the brain would save me the pain and terror of drowning or freezing to death.