Resources: Writing labs and Journalism exercises
A terrific set of interactive exercises that really help you come to terms with both basic and tricky areas of usage.
An extremely comprehensive on-line guide to grammar, style and punctuation for journalists according to the Associated Press Style. Lots of good exercises and quizes.
Charles Darling: Guide to Grammar and Writing
An interactive site with lots of grammar and writing exercises and quizzes.
A very comprehensive site with multiple resources on grammar and style.
Purdue's Online Writing Lab (OWL)
A comprehensive site with resources, guides, online tutorials and some interactive exercises on writing techniques and grammar.
Free online revision courses in all aspects of journalism and editing practice.
A test and a list of other tests and resources compiled by Mindy McAdams.
50 Writing tool tips from the workbench of Poynter's Roy Peter Clark. A great series to sharpen your basic skills.