What to bring on a 6 month trip around the world?

As you can imagine  it is pretty hard to pack for such a long time especially if you are only allowed to bring max. 20 kilos but the less the better as we have to carry everything by ourselves. So i created a list of things that I will take with me.... just in case you plan a similar trip, you can use it as a help. Or some extra hints what else to take or buy would be useful as well.

Packing list:
Clothes:
1 x Pullover; long sleeve shirt, skiing underwear, 2 x trousers long  (one for cold days and one for warm days), pants (1x), 1 x dress (for fancy occasions), underwear for 5 days, sweat pants (1x), socks for 5 days, gloves, cap, scarf, swimming suit (2x), double layered jacket,

Shoes:
hiking shoes, ballerinas, flip flops, sneakers

Extra stuff:
Camera, 4 x memory card, battery charger camera, extra battery for the camera, mobile phone, charger mobile phone, mp3 player, charger mp3 player, sleeping bag, earrings, necklace, thin cotton sleeping bag (to prevent touching disgustingly used sheets in youth hostels), mosquito net (malaria prevention), bag, netbook ???? (still thinking about it), charger netbook, international student ID, international drivers licence, torch, cuttlery, pocket knife, trekking towel small and big, passport, Lonely Planet South-East Asia and Lonely Planet Australia

Toilet bag:
Tooth brush, tooth paste, soap, shampoo, suncream, meds (lots of stuff, recommended by my doctor just to be safe), eyeliner, mascara, eye shadow, razor, tissues, brush, hair band, blow dryer, nail scissors, little mirror,
  

Well basically that is it!!!!!!!! Amazing I am impressed by myself and my "downsizing" skills!!!!