1. If you are not sure, always start with Auto (AWB). The Auto White Balance (AWB) setting tells the camera to set the white balance for you automatically. This is a good place to start; if the photo turns out well in your preview, then there is probably no need to further adjust the white balance. But this setting can be hit or miss, so you may have to try another option.
2. If you picture has red or orange tint , the Tungsten setting (usually a light bulb icon) adds blue to the photo to compensate. Regular (tungsten) light bulbs give off an orange tint, so this is a good setting to use indoors when photographing under incandescent lights.
3. If your picture has greenish tint in it, use Fluorescent setting (usually a fluorescent bulb icon) which adds magenta into the photo to compensate for the green tint given off by most fluorescent light bulbs. Use this setting indoors under fluorescent lights.
4. If your photo has Blue tint, the Cloudy setting (usually a cloud icon) warms the photo up by adding orange to compensate for the blue tint given off by clouds. Use this setting when photographing outdoors in cloudy or overcast situations.