Some people want nothing more than to live and work in the wild, while others have the great outdoors thrust upon them. That's exactly what happens to Chuck Noland (Tom Hanks), an efficiency expert who suddenly has all the time in the world in Castaway.

As an analyst for Federal Express, Chuck constantly looks for new ways to make deliveries more efficient and timely. His devotion to both the company and the clock make him such an asset to the company that they send him to overseas locations such as Russia. The clock runs his life so much that Chuck even has to book time with his girlfriend Kelly (Helen Hunt). The clock finally stops, however, after a FedEx plane crashes into the ocean, killing the crew and stranding Chuck on the shores of an island, thousands of miles from home.

Not the greatest outdoorsman, Chuck is forced to bring himself up to speed on the basics of hunting and fishing. He even spends several painful hours learning how to make fire the old fashioned way, wishing the entire time that he had a lighter. With no working cell phone and unforgiving ocean currents surrounding the island, Chuck's stay on his tropical paradise stretches from days to weeks to years. His only companion there is Wilson, a volleyball that Chuck personalizes with a face and hair. Throughout his ordeal, Chuck keeps up a constant conversation with Wilson, but the audience never hears exactly what the volleyball is saying.

Enhanced by an intriguing performance from Tom Hanks, Castaway shows what happens when an executive who is used to the suburbs has to fend for himself, without benefit of clocks or cars. Hunger is a great motivator, and Chuck's situation forces him to hunt for food and water on the island. He crafts crude tools out of stones and wood and, eventually, he becomes pretty good at spear fishing. Despite getting back to nature, though, Chuck wants nothing more than to return to civilization and his beloved Kelly.

Castaway, rated PG-13 for intense action sequences and some disturbing images, is available on DVD.

From early spring to late fall, your wilderness adventure can bring you into contact with poisonous plants. Whether it's poison ivy east of the Rockies, poison oak west of the Rockies, or poison sumac in the humid wet areas of the southeast, plants across the country are just waiting to give you a rash.

The first step in prevention is learning to recognize the plants. Poison ivy is a low-growing plant, a vine, or a shrub. The leaves can be either smooth-edged or notch-edged, and they're usually in groups of three. Poison oak is nearly always a small bush, but can also be a vine. Its smooth-edged leaves can be in groups of three, five or seven. Poison sumac is either a small tree or shrub. It's pretty leaves have nine to thirteen leaflets on a red stem, and flowers that become small white fruit. All of them irritate the skin.

Since it's hard to recognize them, and since their foliage is usually combined with other concealing foliage, the second preventive step is to dress for avoidance, although this may be uncomfortable in warm temperatures. A long-sleeved shirt, long pants (these are convertibles), high-cut boots, and long socks can help protect your body, but only gloves can save your hands.

These plants produce a oil or resin called urushiol that causes an allergic reaction when it touches the skin of about half the population. The oil can stick to your clothing, your pack, and even your pets and you can get the rash from touching anything that still has the oil. When you get home, thoroughly wash everything.

If you think you touched it, wash your hands immediately, using soap. The rash usually takes between 24 to 72 hours to develop, but for the 15% of the allergic population who are severely allergic, it can start as soon as 4 to 12 hours. In this case, urgent medical care is necessary, as it can become anaphylactic shock.

If you get the rash, you can treat it with oral antihistamines, which you should carry in your first aid kit, calamine lotion, and/or an antihistamine cream or cortisone cream. A cool damp compress helps soothe the rash, which generally goes away on its own in two to three weeks. If the rash is very severe, see a doctor for a prescription steroid, and take it long enough to completely cure the rash.

(Sources: http://www.medicinenet.com/script/main/art.asp?articlekey=82545 , http://www.duke.edu/~cwcook/trees/tove.html, http://www.emedicinehealth.com/allergy_poison_ivy_oak_and_sumac/article_em.htm )

If you've followed Survival of the Fittest, you know how to dress for cold weather and how to set up a camp that can protect you in a winter storm. But pay attention: hypothermia, a gradual cooling of your body, can kill. Know the symptoms, how to avoid it and what to do if someone in your group develops it.

The early symptoms of hypothermia include shivering, pale or blue-gray skin, and what the Mayo clinic staff call the "-umbles:" stumbles, mumbles, fumbles, and grumbles. The grumbling may appear as indifference to what's going on, and the mumbling can also appear as slurred speech. Difficulties with movement and balance are the stumbling part, and can also appear when numbed fingers fumble with tasks like pulling up a zipper. Later symptoms include confusion, slowing of breathing and pulse, muscle stiffness, extreme fatigue and loss of consciousness.

Most people assume that hypothermia occurs only when the temperatures are below freezing. That's a myth. If the weather is cool and cloudy, and you get soaked with rain and don't get into dry clothes and a warm place, you can get hypothermia. Cold water is another common cause of hypothermia. Depending on the temperature of the water, it can take several hours or just minutes of exposure to develop hypothermia.

Preventive measures include layering your clothing; wear a thin pair of gloves inside your regular gloves and double up your socks. Keep your head and ears covered with a hat or headband. Avoid too much exertion; evaporating sweat can make you much colder. If you swim in a mountain lake, make sure it's not too cold and don't stay in too long.

If someone is wet or cold and showing signs of hypothermia, get them back to camp immediately. Strip all the wet clothing and leave it outside the tent. Dress them in warm, dry clothing or wrap them in a sleeping bag, and warm their feet with dry wool socks or primaloft or down booties. Heat stones in a campfire, wrap them in fabric, and bring them inside to help warm the cold person. Provide plenty of hot liquids to warm the victim from the inside. Get the victim of hypothermia out of the cold and back to a better shelter, and apply medical care if needed, as quickly as possible.

Enjoy winter sports and mountain lakes, but make sure you can survive hypothermia.

(Sources: http://www.mayoclinic.com/health/hypothermia/DS00333 , http://firstaid.webmd.com/tc/hypothermia-and-cold-temperature-exposure-topic-overview, http://www.mayoclinic.com/health/fitness/HQ01681 )