I suggest you start exercising / taking care of your health now. Sitting around wilfing (look that up) is a lot easier than exercising or sticking to a diet. I think it is wishful thinking that once you have time, you will magically start taking care of your health. Look around and you'll see many retirees with all the time on their hands and bad life habits.
The time to build those good lifestyle habits is now - and doing it will also serve as an example to your child.
I agree. I am actually worried my health will decline once I retire. Since I won't be getting up for work five days a week, I will be tempted to have a few extra drinks than I normally would. Plus, as one ages, i would think you begin to worry less about things like cholesterol and blood pressure when you know the end is insight anyway.