Ladies, gentlemen: Can you give one advice to your other half to make for smoother communications?

The interesting question by @Blackberry some minutes ago delivered a great advice from @Judi.
So my question here now is, if you also have some wise advice to your other half (be they male, female), or to males or females in general, that would make communication in relationships a bit smoother?
I am a man, and I am a man that sometimes says No, there is nothing.
I asked my girlfriend to insists for a bit…, ask me again C’mon, we both know that when you say this, there really is something., hoping that in time I won’t need her asking it anymore, because I have learned to overcome my reservation it worked!

Edit to add: For my benefit (and possibly others’ too) could you dress your advice with an example from everyday life (like @picante did)?
Thanks in advance!