Histograms - Many digital cameras have a "histogram" feature (for an indepth description of histograms, click here).  The histogram can tell you by the numbers if you have exposed an image correctly.  This is especially helpful in bright sunlight situations where your LCD screen can be hard to see.

Screen Covers - A screen cover serves two purposes.  It shields your LCD screen from harsh light, allowing you to accurately review your photos.  When your camera is not in use, it folds down to protect the screen.  Photo Express has screen covers for a wide variety of digital cameras, from point and shoot to SLR.

Zooming In and Out - Most digital cameras allow you to zoom in on your photos, which is helpful in checking for sharpness, blinks and more.  You can usually zoom out as well, viewing several photos on your LCD screen at once.  Your camera may also let you skip past 10 or more photos at once while viewing multiple photos.  Look for these symbols when zooming in and out: