phrases - Another way to say "it never hurts"

It wouldn't hurt you to be a bit more serious.

Wouldn't/won't/never hurts make perfect sense in this example. I'm wondering if there's any alternative way to preserve the meaning of this phrase in a little bit less strict context, while also avoiding a negative connotation, such as in these sentences.

1. It (or whatever) ... to say "Thank you".


2. It (or whatever) ... to keep an eye out for the perfect job.

And if there are other ways to say never hurts, what do you think about their differences then?