I don't think anyone has taken into consideration that fighting in the streets for your life is a whole different animal than fighting in an organized sport where you know the extent of damage you're going to come out with. Actual combat that ends negatively in some way no matter what you do requires a different set of both rules of engagement, and techniques. When people want to square up with me in the streets I'm always conscious to let them know my 3 rules of fighting for my life:
1) ANYTHING can and will happen. I might have a headache, or diarrhea that day, so a win is meaningless basically. There's tons of mitigating circumstances attached. Any win in a street fight deserves an asterisk by it, or should be written off and moved on from. You defended yourself that day, great.
2) If a person wants to fight me and me to use Martial Arts they're best to do it in an empty room or open field. Otherwise they get hit with everything I can lift before my hands or feet touch them. You threaten my well-being in my everyday life (outside Professional fighting) I can and will disregard Professional fighting etiquette and do whatever it takes to walk away with minimal damage to me and maximum damage to you.
3) You must be prepared to end up in one of two places. The Hopsital, or jail. I personally have been to both. So I'm no stranger to it and know there is life after a sound ass-kicking. Many of which I've taken.
All that being said the first major places I aim for in a street fight IS the eyes, the throat, and the groin. Like those old Samurai movies, you don't dance around and shout, or perform fancy-pants movements. You strike fast, strike hard, take the guy out. It's best also to do it right when he's in the middle of a sentence (because guys in the streets talk shit even after they've swung at you initially, they do this to assure themselves they REALLY want to get into it). Lead-hand finger-jab to the eye, follow-up cross to the throat, back-leg kick square in the nuts, executed as fast and hard as possible. Nine times out of ten one of those will land, fight is over. Nine times out of ten though you can also talk a guy out of a fight if you simply recite those rules calmly, and blinking as little as possible. Or you could also tell him you don't want to fight him because there's no money in it, that if he puts up whatever is in his pocket or his next paycheck, then you'll fight him. Most punks don't at all want to put their money where their mouths are.