If you help me I'll 'make it worth your while'. [=I'll make it worthwhile for you; I'll reward you for helping me]
Seeing my children's joy made building the tree house all 'worthwhile'.
The money is for a 'worthwhile' cause/charity.
(..) I mean, it was a real choice. This way, I think, is, I don't know, crazy. It doesn't really work. If I ever want to write something worthwhile, I have to, you know, get rid of my illusions, and then I'd be happier in the past, as where I want a home. So... (..)2011 Midnight in Paris