>>982066It's not smart to cross at crosswalks, because you're going faster than a pedestrian would and drivers do not anticipate this. If there's a right turn i wouldn't cross at the edge of the right lane either, you want to be in the center of the lane or ideally pacing traffic in the left lane, otherwise you're implying that you'll turn.
http://www.sheldonbrown.com/brakturn.htmlAlso learn to brake correctly, favoring your front brake 90% of the time. Then you won't go OTB in an emergency.