Portable Income: Teaching.
There are not many things in life better than being able to make a valuable contribution whilst you make a living, especially if you can see the value you are providing every day. Teaching is one of the most generous things a person can ever do and if you are qualified to teach English anywhere in the World, by having a TEFL qualification for example then you have at your disposal a way to support yourself wherever you go.
Sometimes a traveller will want to stay put for a while. Maybe for a month or two or maybe longer; a year for instance. There are a pethora of opportunities for teaching English from a short term contract of a month or so or longer term of a year. Furthermore, with a TEFL qualification you will also be able to legally provide private tution to students, which normally pays even better than a contract with a state school or language school, but be very careful to check out the legalities of this depending on which country you are working. Some countries, Thailand for example are pretty strict with work permit requirements.
