Increasing your exposure is another way to get more light into your shot. This is helpful as light is fading during the sunset hours. I rarely use this setting, but it's there if you need it. Don't forget that increasing your exposure makes your shot more prone to digital noise.
|-2 Exposure on a Panasonic Point and Shoot|
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If you have a point and shoot camera, you might have a "Sunset" setting in your scene controls. When you choose this setting, your camera is automatically decreasing your exposure for you, giving you a more colorful sunset.
Don't forget to change your exposure back to its default setting when you are done. Otherwise, you will be frustrated when your next photo session turns out dark. :)
Have fun with this little trick.