What is a response to 'Have a good weekend'?

Thank you, and You too is a thoughtful response to 'Have a good weekend'. Examples of thoughtless responses are 'I will' or 'Thank you'. It's considerate to return the wish. When you don't, it's as inconsiderate as when someone says 'Hello, How are you', and you just say 'Fine' or 'Fine, thanks'. You need to go the next step by saying, 'Fine, thanks. And how about you?'