More tips here:

If you are flying with AA, you will land at DMK airport. I strongly recommend to take the public taxi to the city as the rate is cheap. This is what you do when arriving:

1) Collect your luggage and exit the custom check.

2) You will see some taxi counters at the arrival hall, and the staff will ask you if you want a taxi. Just ignore them.

3) Walk straight to the exit door, and you will see this:

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4) You will also see some other opt of transport to the city, but recommended to take the public taxi as it's cheap and convenient.

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5) Exit the door and you will see more signs, it's impossible to get lost 

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6) Here's the taxi counter, and the queue:

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7) Once you reach the counter, just tell the attendant the location that you wanted to go, and he/she will pass you a receipt. No need to pay anything at this counter. The taxi driver will then bring you to his taxi.

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8) Check that the meter is switched on and reset:

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9) The driver might ask you if you wanna to take the express-way (toll) or not. I think it's worth to take the toll one.

10) Then sit back and enjoy.

11) Our journey to Tune Hotel Asoke took only around 30 minutes and the fare, including the 50 bath surcharge and the 45 batch toll, is only 280 bath 

Will share more in my next post