Taxi problems from the airport are not as common as they are from places in the City. Drivers from the taxi stand/queue have their license numbers written on a paper that is given to you as you are assigned a car.

The only Taxi problems you're likely to encounter from the Airport is if the driver doesn't know exactly where to take you.

Having the phone number of a Thai person (from the hotel, etc) handy. Make the motion of talking on the phone and borrow the taxis hand phone to help him with directions. He'll be happy to lend you his phone if it makes the trip quick and easy.