Look at PWC’s outline of megatrends; these will affect strategic planning.
www.pwc.co.uk/issues/megatrends.html

For excellent articles on key business issues such as strategic management, look at management consultancy sites such as:

Boston Consulting group
www.bcg.com

Goldman Sachs
www.goldmansachs.com/insights/

McKinsey
www.mckinsey.com

PWC
www.pwc.blogs.com

Other valuable sources for business information include

BBC business
www.bbc.co.uk/news/business

The Economist (paid for)
www.economist.com

Financial Times (paid for)
www.ft.com

Wall Street Journal
www.wsj.com/Europe