What To Take Equipment (continue...)

Here are some other filters.
Color Enhancer

Enhances reds, but can leave a cold blue/violet cast and is expensive.

Color Correcting

Enhances particular colors - green is good to enhance foliage. For example, a CC20G adds 20% green by reducing other colors by 80%.

Single Color

Add an overall blue, orange or sepia cast to your shot.

81A, 81B or 81C

Simulates late afternoon light by adding an orange/brown cast. A is light, B medium, and C strong.

Haze 1 or Skylight 1A

Can reduce haze at high altitude. Skylight 1A adds a slight pink "warming" cast. Used often to protect lenses.

Neutral Density or Split-Field Neutral Density

Reduces the brightness of a scene, for better control of aperture. A split-field neutral density reduces a bright sky to match a shaded foreground.

Red or Yellow

Increases tonal contrast in black-and-white photographs.

4. Extra Photo Storage
If you're going on a long trip, you'll be taking lots of photos, so you'll need some way to store those pictures. Depending upon what type of camera you have, take extra "flash" memory cards or film, a photo hard disc, or laptop.
5. Camera Care
Dirty lenses or filters produce low-contrast images and washed-out colors. Keep things clean with a soft lint-free cloth, special dust-free tissues, lens-cleaning fluid, and a blower brush. A pair of tweezers is useful if sand or dirt gets lodged inside the camera. A small screwdriver can tighten up any screws that come loose, particularly on long lenses which don't like the vibrations of traveling.
6. Flash
A flash is useful for brightening people's faces on overcast days, and for indoor shots. Many cameras today include a built-in flash which is suitable for most purposes. If you're keen on interiors, consider a hand-held flash to brighten dark areas while the shutter remains open. Remember that many museums prohibit flash units as they can damage the exhibits.
7. Second Camera
If you have it, also take a compact camera, or a disposable camera. This is great for restaurants and quick snaps of unsuspecting friends in embarrassing situations. Many professionals carry a second SLR in case one jams or they're shooting with two different films. But that's a little extreme.
8. Tripods
A full-size tripod is essential for steady, top-quality shots, but is too cumbersome for most travelers. Instead carry a mono pod, or a mini-tripod - coupled with a wall or table, they're almost as good.

If you have a tripod, you'll also need a cable release to avoid camera movement when you take the shot. Alternatively use the self-timer feature.
9. Notepad and Pen
Useful for remembering good locations, bus numbers, details about your subjects, and addresses of people you meet. If you're considering submitting shots for competitions, you'll need to note your camera settings.
10. Batteries
If your camera uses rechargeable batteries, don't forget the recharger. If you're going overseas, you might need a voltage/power convertor. Take a second, spare rechargeable battery, so you can keep shooting.

It's easy to avoid buying spare batteries but there's nothing more infuriating than getting somewhere fabulous and finding out that your camera won't power up. As Gary Larsen (almost) said, just when you find the Loch Ness Monster, Bigfoot, and Elvis, all sitting together, your batteries die.