Advice for new teachers
A number of TEFL Qualifications are available, albeit at some cost, but obtaining one is highly recommended. If you want to get some idea of the sort of things you will have to learn then TEFL Boot Camp will probably be of interest.
Moving to another country
Many people may wish to move to another country to work - indeed, this may be their primary motive. Justlanded provides a wealth of information which will be invaluable to new residents.
For those wanting to get a feel for the life of an English teacher, Thepaininspain is an amusing and informative blog.
Other useful sites
Clearly you should also take a look at Dave's ESL Cafe - the granddaddy of them all along with its associated job discussion forum; and also sign up for the free TEFL newspaper at English language gazette.
If you want something quick and easy for a class then our article on conversation questions for TEFL classes has some good advice and links.
Once you have new students you will want to know their level.
Creating your own classes
If you feel really adventurous then you could follow our guidelines about creating your own topical class.