I think an interpreter should have these qualities: 1. must be able to understand & absorb the speakers' words quickly 2. must know at least 2 languages and able to analyse and explain sentences in different languages 3. must have an efficient way to record or write notes, that is, good note taking skills (eg short hand) 4. most important: must be a patient person, and a good listener too :)

I think to be an interprter,first,you should learn languages very well.and you should have a good memory and Response capability.Also you should know a lot of knowledge which covering a large field.And the most important thing,you should speak that language perfect! Come on!Good luck!

The most important thing is to learn languages which you will interpret very well and to master such ability to translate sentences from one language to another momentally.