The Europa website contains a ‘summaries of EU legislation’ overview. Each policy area contains information on legislation and links to relevant documents: http://europa.eu/legislation_summaries/index_en.htm
The website of the European Commission contains links to the Directorates General responsible for each policy area:
http://ec.europa.eu/about/ds_en.htm
The Euractiv web portal is an independent website providing coverage of EU activities. Its policy pages contain news, in-depth analyses and policy briefings.
The Europa website provides an overview of the EU’s institutional affairs and contains detailed background information on treaties and policy making processes.
https://europa.eu/european-union/eu-law/decision-making/procedures_en
For more on specific policy areas:
Competition: https://ec.europa.eu/competition/index_en.html
Employment, Social Affairs, and Inclusion: https://ec.europa.eu/info/policies/employment-and-social-affairs_en
Regional Policy (including Cohesion): https://ec.europa.eu/regional_policy/index.cfm/en/
Energy: https://ec.europa.eu/info/policies/energy_en
Transport: https://ec.europa.eu/info/policies/transport_en
Research and Innovation: https://ec.europa.eu/info/strategy/research-and-innovation_en