How the heck can you walk in a ready stance down the street without the whole freaken place going 'ooooh, aaahhh'.
I was trained in hand-to-hand combat by the IDF, not by a school or embassy, so my perspective may be different than that commonly taught. But I do use the same approach on my home street as I do in Jenin. There are two types of people who will see you walk: those who might attack you, and everybody else. You want those who might attack you to think "I'm not starting with that guy" but you want everybody else to not notice anything.
I walk normally, but I always 'observe' buildings, the sky, anything that moves in my opposite direction so that I can also look back every now and then. Everybody who I pass gets looked at in the eye and usually gets a friendly smile. Sometimes I let them notice that I glance at their hips and their hands, sometimes I do it discretely. Yes, even women.
When I turn a corner, I do it with the inside elbow slightly bent, and far from the wall / building and I'm always ready to pop back. That has saved me more from speeding bicycles than from terrorists.
Some tips: if you are with companions, walk slightly ahead of them. Thus, the assaulters notice you, not them, and may be discouraged. It also gives you another reason for looking back occasionally. Always know what is available to jump behind if bullets start flying. You'll probably never need it, but it will help train yourself to be aware of your surroundings. When you drive, read all the signs. Again, this makes your driving better but also trains you to be more aware of your surroundings.
Lastly, remember that your goal is to be visible to assaulters, but not to everybody else. Do not look paranoid, in fact always try to look confident. Don't walk like you're ready to fight somebody, walk like you are aware of everybody. And when you are attacked, smile and make the assaulter feel that he just did you a favour by confronting you. That scares them!