LCD vs Viewfinder

Tip: Use the LCD for more accurate frame coverage.

It is true that using the LCD to compose your photographs is the fastest way to drain your batteries. In fact, it is advisable to switch off the LCD and use the viewfinder (for cameras that have a viewfinder!) to conserve battery life. In addition, most LCDs are very difficult to view under bright sunlight, and using the viewfinder helps in composition. On the other hand, most viewfinders suffer from parallax error as the image is slightly "off" from the actual image. This is most prominent when your subjects are closer to the camera, as in portraiture or macro shots. For accurate frame coverage, compose your images with the LCD.