Originally Posted by 5khours

1) Set up your phone so you can make calls in Thailand.
2) Buy a SIM card in the baggage claim area before departing so you can call.
3) All international arrivals funnel out in the same place so it's easy to meet as soon as you come out of baggage claim.4) Depending on how you're traveling out of BKK, meet at a) the entrance to the train, a specific door number on the arrivals level, or c) the lobby of the Novotel Hotel (3 minute underground walk).