Working papers & preprints (see above) are useful for current awareness, but news sources & blogs are even more up to date. Two important sources of quality news in Economics & Finance that the Library subscribes to are:
Other useful places to look are major media organisations, such as BBC Economy News, New York Times Economy pages, etc.
Commercial organisations like Bloomberg and Reuters are important providers, especially for financial & markets news.
There are a large number of blogs in Economics, some of which can be useful, particularly for discussion of current, policy-related topics. Respected blogs include: