I'm thinking of using the DIY templates and creating some hPDA starter
sets to give as a little extra Christmas gift to a few people.

I know many of them won't end up using them, but it's just a few index
cards so no big deal.

I'm trying to keep it simple. Possible some NA cards where I've
already written in "Contexts." Like, Next Action @ Telephone, or Next
Action at Work, etc. Easily understood w/o getting into heavy GTD
education. Also, blank project cards.

What else would you recommend?