Broad categories -

Medical

Fire

Shelter

Water

Orienteering

Food

I wouuld tink that you could put together a full four cards on any of these topics. That adds up to 24 cards of info.

I'm not too sure I would want to find the room to carry a deck of cards for reminders in my pockets. I have and carry the brunton cards with fresnel lens and floating compass. I also carry a printed / laminated (and customized) version of BillVann's cheatsheet in my PSK. Much more than that and I will be out of pocket space. An entire extra wallet of cards for reminders would displace my inspirational mini-book (currently "The Art Of War" by Sun Tsu)