What is necessary to travel from place to place for several months? Shoes (maybe just flip flops), a pair of pants, a t-shirt. Passport. And cash. I think that's all you really need. A towel and a toothbrush, if you want to get fancy.
In a world full of personal possessions ("stuff" as George Carlin would say), narrowing my life down to a bag full of necessities is absolutely freeing. Last trip I over-packed, and for a short time I believe my neck vertebrae separated due to the weight of my shell (seems fine now). I have since learned that bootleg Lonely Planet guides can be bought in Cambodia for a dollar
