This technique is a bit sneakier, but it does get some great shots. Carry the pre-focused camera in your hand at hip level with the strap wrapped around your wrist and take pictures without looking in the view finder.
If you're thoroughly familiar with your gear and the camera has become an extension of your body, an ability to not use the viewfinder allows you to take pictures you might otherwise not get. You can sit on a bench with the camera perched on your knee and look in another direction as you press the button to take a picture of a guy playing his guitar on the street. If you lifted that camera to your eye, the ever-eager street musician would likely stop, pose and maybe even ask for a tip. That's a completely different picture than the one you likely wanted to take.
Keep in mind that some photographers, Shivery included, consider this "street mugging." These photographers feel it isn't fair to capture someone's image without their knowing that you're even taking a picture. Again, this is up to each individual photographer to figure out what he or she is comfortable with.
And finally, one last twenty-first century tip on the next page.