I don't think you should...
You ought to..
you keep early hours from now on.
Are you feeling better today, Steven?
B: Much better. But I am still coughing at night.
A: You should take advice from your doctor to quit smoking. It's bad for your health.
B: It doesn't matter. I'm sure I'll be all right in a few days. Just like I got sick last time, I still got better even if I smoke.
A: That's because you weren't seriously ill last time. But this time, the doctor has made it clear to you not to smoke.