I'd store all of the stock prices plus lottery and sports results from 1975 onwards on it and encrypt the whole thing. Then I'd start buying stock and lottery

I'd store all of the stock prices plus lottery and sports results from 1975 onwards on it and encrypt the whole thing. Then I'd start buying stock and lottery tickets. Then once the internet was invented I'd start leaving odd time traveller hints across the web so those guys who recent ran that study about internet time travellers could then have some positive results. My first priority would be to obtain an identity. Assuming I know when and where I am travelling to I would travel with the details of someone who had very recently died who suited my purposes and would take over their identity on arrival before any death certs are issued and social security records were updated.