Watch out for the people who have a sob story for you-it is probably not true. When taking a taxi from the airport know what the taxi fare is (i believe it to be about 30)they like to rip you off. Won't really have to much trouble with this.
Taxi drivers can be really bad for your health. Living here for six months taught me that not everybody is genuinely friendly. Some have been known to take you round the corner for their friends to join you and remove the contents of your pocket.