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.