What works for a person works of course, but pulling out my phone and just holding down a button and saying "add onions to shopping list" is very helpful halfway through cooking some stuff in a kitchen.

Of course I could put that on my fridge and have a marker. But it's "I need my list right now and have almost no free hands to do this" in other parts of the house too (toilet paper etc). Meanwhile my phone is always in my pocket.

Maybe time to just keep a pocket pad + pencil in my pocket though...

In my family a few people add things to the list, from different rooms even, which would be impractical if we were passing a single steno pad around.

Computer calendars and shopping lists probably make more sense as more people are involved. I just keep a single list.