Man it is tough raising kids. I am 38 and only 13 years into being a parent - my youngest will be 8 soon. I don't whoop my kids, but they get/got "popped" on the butt (or whatever tender spot is available) from time to time, to remind them to straighten up when they start acting ugly. It took a little bit (honestly started a little late after realizing it was in fact NOT a bad thing) but they know what not to do most of the time. There can be a fine line between having some grace and not taking no shit. I don't want them to be scared of me or mom, but they need to know its not smart to push it or to do the wrong thing, especially after the first time. They aren't little assholes, no where near it, and are fine examples around their friends and class mates. That is important to me. Just in the last year I have started to get a little more strict with things, but I am not a drill sergeant by any means. If I have to say certain things twice, its louder and quite a bit more powerful the second time - that is when their eyes get big. I don't know if we are doing it right but I think we are doing ok.
I got just a couple of whooping as a kid, but never anything extreme. Most of the time it was because my younger sister framed me.