I also use pencil and paper to figure out what numbers I need to feed into the calculator to arrive at results calling for logarithms (as, for example, when I'm working out how much aquarium water to change in order to achieve the desired rate of turnover). This works best if you can read your own writing.
I also write out my own shopping lists as opposed to :: ahem :: cough-cough :: calling home to ask what we're out of. Granted, the cats are not likely to give me reliable information. But it's the principle of the thing. So long as it's not much more complicated than ᑏ I may even be able to read it when I get there.