I can’t speak at great lengths on clothing, as I believe this can be a personal choice and determined by different people’s needs. However, I’ll say that you ought to always pack light, and think about whether you will in reality need an item of clothing. Sometimes, I’ve fallen into the trap of packing too much clothing ‘just in case’. Whilst travelling in Asia it’s possible to grab cheap clothing, so you don’t have to in excess of pack. The minimum I’d personally take for 30 days travelling is: 3-4 t-shirts, 2 shirts, trousers, two shorts, swimming shorts, 2 pairs of socks, trainers/sneakers (I would buy some that seem to be formal but you are as comfortable as trainers).
Being a dandy backpacker I’ve a vast array of toiletries. My toiletry bag includes: shavers, moisturizers, sun cream, nail clippers, eyebrow tweezers, aftershaves (which I am inclined to invest in airport duty free), lip balm, deodorant and much more!
I recommend going for a large travel towel. These may be folded into a really small size and take little or no space within your luggage. They also dry quicker than ordinary towels.
I must say i am not aware about cameras but I definitely know that you will want one on your own journey. It’s a method of recording experiences which are not possible in a alternative route. I recently bought an 8 megapixel camera in Bangkok – they have served me well.
You’ll need these to your camera, so don’t forget to take enough spares out of your own country, which usually are less than whilst abroad.