You can'tworkall thetime- it does you goodtogo out andenjoyyourself sometimes.
Take themedicine- it will do you(apower/worldof)good(=improveyourhealtha lot).
It'll do you good to get somefreshair.
It would do him some good tosocializeabitmore.
Take abreakand go out for awalk- it'll do you good.
Ithinkit would do her good to get away for a fewdays.