Forget the tuk tuks; they’re dangerous, smelly and overpriced. Forget the motorcycles; they’re dangerous and lack aircon. Forget taxi’s; they get stuck in traffic and are not always easy to find. I will not even mention the stinking, death traps driven by yaba and red bull fueled bus drivers.
Public transport in central Bangkok is cheap, easy and comfortable. The BTS, otherwise known as Sky Train is a cheap, quick and painless means of traveling around Bangkok. They are air conditioned, well sign posted, beggar free and include handy location maps on platforms for tourist and locals alike to orient themselves. The BTW always lines up with the MRT or subway.
Each platform has a handy ticket machine, in which you select your destination, insert the required coins, (all stations have change booths as well) and then collect your one way ticket. An even easy method is to purchase a top up card, and then you always have a ticket when you need one.
The sky train even has a station at the airport, for a mere 55 baht you can travel comfortably and traffic jam free into town !
more details can be found on their official site, http://www.bts.co.th