Do a good turn daily.

One never loses anything by doing a good turn .

If you wish to do a good turn, do it.

I am to do a good turn for them.

Do him a good turn.

"Here's my opportunity to do a good turn for some poor chap. "

I was glad to do Max a good turn.

He says he saw the opportunity to do a good turn and was glad to take it.

- I want to do you a good turn. - A good turn?