Some street photographers prefer to discretely take photos of their subjects while others are very open with their approach. I find myself in the former group and prefer taking candid shots of my subjects. There are various techniques that can transform you into a photography ninja. One such technique is to pretend to take photos of something above your subject via the viewfinder and then actually snapping the photo while bringing the camera down to preview(chimp) your shot on the screen.
I utilized this technique in the photo below. After taking his photo I noticed him starring right at me as if a little annoyed. So, I raised my camera aiming it at an object above him, pretended to take a shot and then lowered it as if previewing my shot in the screen. I always shoot from the hip so this technique works well for me.