Blogs I like:
Paul Cornell's great blog on his comics and SF writing.
Christopher Fowler's blog and his short story tips.
Michael Marshall Smith's occasionally updated blog.
Zoe Marriott, blogging on being a writer for young adult (YA) fantasy readers.
Richard Herring's awesome Warming Up: the trials and tribulations of an almost-household name comedian.
John Ashbrook's Cellulord, where he (all-too occasionally) sounds off about films.
BBC Writersroom - essential if you're interested in working as a writer for scripted TV and radio in the UK.
The fascinating Lawrence Miles's Doctor Who blog.
Neil Gaiman's journal.
Cory Doctorow's Craphound.
Charles Stross's AntiPope.
Competition listings sites:
Fiction Garden: http://www.fictiongarden.co.uk/writingcompetitions.html
NAWG (National Association of Writing Groups) listings page: http://www.nawg.co.uk/competitions/open-competitions/
Thresholds short story forum listings page: http://blogs.chi.ac.uk/shortstoryforum/?page_id=3426
Michael's Pub - a great resource for North American competitions listings: http://www.mwgraves.com/Writers/sscontests.htm
Sally Quilford's Writing Calendar: http://writingcalendar.wordpress.com/
Christopher Fielden's roundup: http://www.christopherfielden.com/short-story-tips-and-writing-advice/short-story-competitions.php