Vocabs

Can I use 3 phrases: on the menu, off the menu and back on the menu in these circumstances?
Please correct me if I was wrong or my sentence was not that good. ^^
How often do you do exercises?
"Personally I'm not really into the sculpted body, 6 packs or something, but it doesn't necessarily mean I don't mind staying healthy. So doing exercise is always on the menu"
Do you smoke?
"Well, basically I used to smoke a lot in the past, but after realizing how harmful smoking can effect on the body, I gave up gradually and now it's off the menu"
Have you ever tried to give up a bad habit?
"I did stay up late to prepare my graduation exam when I was in grade 12, and that's a reason I got that bad habit. I should have given up completely if I didn't get tempted to play games with my friends at night. I did give up but now it's back on the menu"