Mexico City has an inexpensive, easy-to-use metro and an equally cheap and practical bus system plying all the main routes. Taxis are plentiful, but some are potentially hazardous - people have been beaten, robbed and sexually assualted by cab drivers. Always call for a taxi rather than hailing one, and make sure to get the driver's license plate and name from the dispatcher so that you know that you're getting into the right car.

Cycling is a pleasant way to see the city, especially as the weather is clement and the ground flat, but watch out for potholes and loco drivers.

Obvious though it may sound, always look both ways when crossing streets. Some one-way streets have bus lanes running counter to the flow of traffic, and traffic on some divided streets runs in the same direction on both sides.