We definitely live in the dark ages, we have no apps on our phone to go geocaching by.
Everything is written down and space is left for notes on each find. I usually use spiral bound notebooks and put 2 caches per page.
We choose our caches from the GCA map.
When we are having our usual 3 month escape to the 'big island' all the caches we plan on finding are written down ready before we leave. This system does fall apart when caches have been disabled between when we decide to do them and when we actually get there.
A very archaic way to cache but it suits us and is all we have ever known.
Thanks.