For interpreters interested in certification. Sources for exam prep, learning about prerequisites, practicing interpreting; both consecutive and simultaneous, codes of ethics for medical and legal interpreters, developing listening skills and professional organizations.
Dictionary and language forums:
Linguee allows you to see how other professional translators have rendered words from one language to another in print across government documents, the net and other publications (it ranges from super useful and elucidating to pathetic):
Word reference is both dictionary and forum; in different languages, with input from experts and…sometimes the clueless, but I can often find the answer to a question here.
For active listening skills:
Memory and recall:
And, an excellent way to practice your interpreting for both consecutive and simultaneous: audiobooks, available for free at your local library in various formats, at audible.com for a fee and other venues. Just think: you can rewind as many times as you wish, change the speed of narration and listen to something you find worthwhile, entertaining or educational while you train yourself to improve your skills. Add in a recording of your performance and you have a toolkit in a teeny-tiny box to become a better interpreter.