Seth has written a post about how to get started in the ESL business:

Living abroad is never easy. It’s fun, it’s rewarding, but it sure isn’t easy. However, finding a job as an English as a Second Language (ESL) teacher is easy if you know what you’re doing and what you’re looking for. It’s also one of the easiest ways to leave your home country and live abroad for a year or five.

Teaching ESL is not a long vacation. It is definitely a job. At the end of the day, my sore feet and frizzled  brain tell me it’s a job. But it’s one of the coolest jobs I’ve ever had.

Read more here.