Before the computer, there was the Filofax. This paper-based personal organiser let you keep all your important information in one place, giving you complete control of all your contacts and appointments.
A Filofax has no battery to run flat, and the availability of refills means its storage is effectively unlimited. It can last forever. For those who cannot wean themselves from electronics, Filofax has options that work with tablets too. Organise your life for the better.