Yeah, every now and then you see something about an actress who is in her 40s and "still looks amazing".  Well yeah, she was attractive in her 20s and didn't let herself get fat or tan to a crisp.  You'll still look pretty good well into your 50s and even 60s if you follow those simple rules.  You're not going to look as good as when you were 20 of course, but there's no reason to be as decrepit as most people are at 50+.