To turn to account

to be made profitable or advantageous; to become worth the while.
- Locke.

See also: Turn

References in classic literature ?
The red-room was a square chamber, very seldom slept in, I might say never, indeed, unless when a chance influx of visitors at Gateshead Hall rendered it necessary to turn to account all the accommodation it contained: yet it was one of the largest and stateliest chambers in the mansion.
And I, through pardonable weakness, refrained from correcting the error; asking myself what good there would be in disturbing his last moments with information that he had neither power nor opportunity to turn to account.
The quarrel gave the elder lady numberless advantages which she did not fail to turn to account with female ingenuity and perseverance.