Below is a list of the travel equipment that I use.
The following kit seems to be sufficient for me no matter where I travel!

Clothing
01 Jeans
01 Light-weight/ trekking trousers
01 Casual shorts
01 Swimming shorts

03 T-Shirts
01 light long-sleeve shirt
01 Warm long-sleeve shirt

06 Underwear
02 Boxers for sleeping
03 Leisure cotton socks
02 Light socks
01 Bandanna
02 Trekking socks
02 Trekking inner socks

01 Belt/ Belt Safe (Leather)
01 Baseball cap
01 Fleece (Windproof)
01 Thermal underwear
01 Waterproof jacket

01 Walking boots
01 Sports sandals
01 Smart/casual shoes
01 Shower shoes

Miscellaneous
01 Day pack (25 Litre)
01 Backpack (65 Litre)
02 Backpack covers
02 Plastic backpack liners
01 Rice sack

01 Scrubbing brush
01 Elastic clothes line
01 Multi-purpose string/cord
01 Sewing kit, including safety pins etc.

01 Sleeping bag - (3 Season/ -10 Celcius)
01 Sheet Sleeping bag - (Great when the bed is not to clean or you need to keep insects off)
01 Mosquito net

01 Torch - Maglite AAA
01 Swiss Army knife
01 Water bottle, 1 ltr, Sigg
01 Light-weight cutlery set
01 Plastic plate and cup

01 Padlock
03 Mini-padlocks
01 Length of chain
01 Waist money-belt
01 Leg money-belt (Tubigrip elastic bandage)
03 Sew-in secret pockets

01 Sunglasses
01 Watch (Waterproof, with alarm)
01 Camera - compact 35mm
03 Films
01 Personal radio (Walkman style, uses less batteries)
01 Small calculator

03 Pull-string mini stuff-sacks
05 Assorted plastic bags
01 Permanent marker pen
01 Parcel tape
01 Selotape
01 Pen

Medical Kit
01 Plastic Medical Box
01 Mini plastic medical box (To carry on day hikes)

01 Pack of paracetamol (Pain and Fever)
01 Pack of Ibuprofen (Pain and Inflammation)
01 Pack of laxatives (Just in case)
01 Pack of antihistamine tablets (Allergies)
01 Anti-fungal foot cream (Especially in the Tropics)
01 Loperamide Hydrochloride (Imodium, against loose stomach)
06 Rehydration salts
02 Packs of Mefloquine (Lariam, against Malaria)
01 Iodine antiseptic paint (Betadine)
01 Cold sore cream (Zovirax, if necessary)

01 Pack of plasters (Fabric Elastoplast)
01 Crepe Bandage (5cm x 4.5m)
01 Dressing Bandage (5cm x 4m)
01 Pack Adhesive wound dressings
01 Pack of anti-septic wipes

01 Clinical thermometer
01 Eye-bath
03 Foam ear-plugs

01 Bottle of Iodine purifying tablets
01 Polar Pure Iodine water purifier

01 Permethrin mosquito net impregnation kit
01 Insect repellent (Repel 100, 100% DEET)

01 Lipbalm
01 Sports sunblock (Sweatproof)

01 Multi-Vitamins

Toiletries
01 Wash bag
01 Travel mirror
01 Light-weight towel

01 Razor
01 Razor Blades
01 Shaving soap stick
01 Shaving brush

01 Hair brush
01 Shampoo

01 Soap
01 Soap dish
01 Deodorant

01 Toothbrush
01 Toothbrush holder
01 Toothpaste

01 Moisturizing cream
01 Aftershave

Documents
01 Nylon document holder/organizer

01 Passport (* plus photocopy *)
01 Health Passport, Yellow Fever cert. (* plus photocopy *)
01 Insurance policy (* plus photocopy *)
01 Driving license (* plus photocopy *)
01 International driving license
01 Security chart (* plus photocopy *)

01 PADI Diving Card
01 ISIC card
01 YHA Card
10 Spare passport photos

01 Flight tickets (* plus photocopy *)

01 Travelers cheques (American Express)
01 American dollars cash ($100 min)

01 Amex card
01 Visa card
01 Cirrus card
10 Personal Cheques (For use with Amex card)

01 Address book sheet (* plus photocopy *)

01 Guide book
01 Maps
01 Foreign Language Dictionary