Touch typing:

[hmpf]

Most unexpectedly massively useful skill I ever learned.

Comments

[dune-drd.livejournal.com]

I never believed that when my mother told me that... but that was before the internet ^^

[beccatoria.livejournal.com]

Absolutely agreed.

In my case I'd say, "most unexpectedly massively useful skill I ever accidentally learned."

But that makes it sound like there are more useful skills I have that I deliberately learned and...I don't think there are, frankly.