Should do what Jack Reacher does: passport, bank card & toothbrush.
I lived with this kid for a few days who'd keep no clothes or anything but had a credit card with a €30,000 credit limit and regular refills. He'd buy new clothes every day and then give the previous day's ones to homeless people. I thought that was kind of cool.
"We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary." — James D. Nicoll