Writing your passwords in a piece of paper. Safer than storing it digitally and easier for people that don’t know how to use password managers or computers in general to understand what to do to access your stuff if you’re under a difficult situation or dead.

Also, physical photos. Yes yes, we all have gigabytes of photos, but almost never check any of them. Physicals catch my glance at home very often, great decoration. I’ve also took to writing the day, place and people on the back, plus any other important bits of context.