Useful links
English dictionaries
The Oxford Advanced Learner’s Dictionary:
http://www.oxfordlearnersdictionaries.com
Cambridge Business English Dictionary:
http://dictionary.cambridge.org
http://www.macmillandictionary.com
http://www.businessdictionary.com
http://thesaurus.reference.com
English newspapers, magazines
http://www.economist.com
www.thelocal.at
http://www.bbc.co.uk/worldservice/learningenglish/newsenglish
and many, many more...