1) During the winter season, a mask is a must. (if not, you will regret) It really helps alot especially for those who are damn afraid of cold (like me,lol) Well, depends on individual's tolerance level and the temperature at that time.
2) Cabs are so much cheaper there! The fares only jumps by distance covered and they are almost everywhere. Just beware of some private drivers out there. They charge at least 50% higher.
3) Traffic is of course not as well controlled there but definitely better than in Bangkok (for those who went before, you know what i mean. the traffic is terrible). But don't ever assume that vehicles will look out for you. Do look out for the traffic lights and the vehicles, try to cross when there's a chance or you will never get to your destination. (cos it's always green light to them)
4) Again, clothings/bags/barangs barangs are soooo much cheaper there! (of cos i don't mean shopping malls). There are so many nice clothings there, especially for ladies. But your bargaining skills must be good. Never hurry a purchase. Be sure of a price in mind and tell them how much you are willing to pay. (as low as possible!) Many of the shops there are selling the same items diagonally/besides each other so don't be afraid that you can't get what you want. Just be patient. However, if you are not sure how much an item is worth, just quote the lowest price you think it's worth or are willing to pay. To get good buys, you must be thick skinned.
My experience is, do abit of research on the internet beforehand. It comes in handy. You will know where you can bargain on prices and you can learn some skills on bargaining as well.
*Important: Never agree on a price they quote you. 99% of the time, it's 50%-80% on top of what it's worth. Take your time to pick and choose while you are there. Pretend to walk out of the shop if they don't want to lower their price. I bet the next moment, you will find them shouting for you back into their shop continuously even when you are already 3 or 4 shops away.
A point to note: Some can be quite aggressive and will pester/pull you into their shop when you walk away.
5) Variety of food- Definitely more than Singapore and it's cheap and nice! Even for those i don't like initially by looks, i find it interesting upon trying.
Woo~~ I would say that this trip is an eye-opener to me.