Here is a tip from lifehacker.com, I tried it out and it works quite well.......Karl
Epell shares a trick for capturing difficult shots:
Here's a small tip I discovered while shooting photos walking around a park few days ago:
When shooting from the hip for candid shots (I did with SLR, but other camera should work too), place your left index finger flat against the lens and parallel to the camera's kine of sight. Point at the subject you are interested in with your finger and press the shutter. You will be suppressed how accurate your aim is........