The Five Essentials
travelers' checks
visas (if necessary)
local & foreign currency
brain (Don't leave home without it!)

Personal Kit
comb, brush, toothbrush, toothpaste, dental floss, Listerine, Kleenex
shampoo, soap, razor, nail clippers, mirror,  hair dryer, cosmetics, sun block
shoes, socks, underwear, pants, blouses, shirts, skirt, belt
shorts, swimming suit, bathing suit, scarf, sandals, rain jacket

Pack for the weather

Winter Clothing
more layers as necessary
down jacket, pile or polypro long underwear, top and bottom
wool or pile cap, gloves, thick and warm socks, boots

Medical Item
bandages(various sizes), antibiotic cream, aspirin or other plan reliever
prescribed medicines, motion sickness pill (if susceptible), multivitamins
note card detailing medical conditions/allergies(keep in wallet)

Add for travel to developing countries
antibiotic (as prescribed), Imodium antidiarrheal tablets,
anti-malarial medications (as prescribed), thermometer, spring water

Optional Items
spare eyeglasses, sunglasses, sunhat, guidebook, language dictionary, map, camera, film, mini binoculars, batteries, Swiss army knife with corkscrew, mini sewing kit, pen, laundry detergent, plastic garbage bag insect repellent, water bottle, umbrella, rubber bands, laptop, palm pilot