Too much of everything is always bad.

Alcohol is not a sin, in fact wine, brandy or beer is good for the health if consumed properly. Not to mention that priests or even Jesus had wine.

And I beg to differ Flor that sex out of wedlock is a big sin., as long as your not committing it with a family man, i dont find it sinful.

As for smoking, yes they are bad for the health especially for the second hand smoker, people that inhales the smoke out from the smoker
have a higher risk of respiratory diseases, as long as the smoker consider the people that surrounds them, or smoke in the designated smoking area, i dont find it sinful.