
l'm not even USEFUL to myself.
Breaking Bad Season 4, Episode 3

Useful talent.
Game of Thrones Season 5, Episode 7

Have you ever considered
trying to do something USEFUL?
The Big Bang Theory Season 4, Episode 20

It's USEFUL for calculating the number
of atoms in a substance,
The Big Bang Theory Season 9, Episode 10

Not precisely,
but I have other skills that would be USEFUL.
Game of Thrones Season 5, Episode 10