Learning how to learn is what I would say is most important...
I wish I was given this advice when I started all those years ago, it might have made a difference.
As some of you know, my Daughter has decided to take up on drumming after the LDS show, she bought a cheap e-kit, I gave her some drumsticks and a pad and some beginner's exercises/lessons to get her started.
I'm not a teacher, definitely not, but she came forward and asked for tips, advices and lessons.
As Larry mentioned, I showed her how to hold a pair of sticks first, then how to play the bass drum pedal.
Then, I explained the timetables, subdivisions and time signatures.
I showed her a few rudiments, single stroke roll, double stroke roll, triplets, paraddidles and how to make combinations exercises of these 4 rudiments and the importance of playing with a metronome.
Finally, I showed her the basic rhythm "the money beat" and some easy bass drum patterns like 1 2 3&4 and 1 2&3 4.
She's also following and taking "lessons" on Drumeo on YT and she seems to be doing fine.
I know it's at a very early stage, but the results so far are very promising.
What I think it's the most important item that I can give her, it's my passion and love for drumming, if I can do that, I'll know she'll be fine