what are things 'you must carry' while travelling?

Journey Ticket - Definitely essential ! Then it comes to other stuff.. Well, I usually prepare a list of things which i need to carry.. esp toilet kit, medicine box which probably covers everything...

i remember what happened to me before while on travel when i read your question. i went out of the country for leisure, and bring my digi cam, laptop and of course cp but when i got there, i realize that i forgot to bring charger for all of them. so i dont have camera since i dont have charger and the battery is not easy to buy coz its not the ordinary alkaline battery, then worst is my laptop will not work without a charger coz the battery was already drained. i supposed to meet with friends but they didnt know where i was coz i just choose hotel when i got there. i cant call them coz my phone battery was drained also, its evening already and what i did is i tried to talk to the hotel management if they will allow me to use computer with internet to email or send offline message to my friends coz they dont know where i am and i explain to them why. and so im glad coz they are kind enough and so i used the computer of their manager that was really embarrassing.