A useful book is Writing for Academic Journals
http://www.mcgraw-hill.co.uk/html/0335213928.html
Some tips I had from a Journal editor:
1. What's the question that underpins the enquiry?
2. How does the question tie in with your theoretical framework?
3. What's the literature that frames the study (wider contexts)?
4. What methods were used and how were they appropriate to the question?
5. How was the data analysed and presented? Was a particular framework used?
6. Is it empirical or polemic (a think piece)?
7. You need to address the questions: 'So what?' and 'Who cares?'
Also agree with previous posters, read journals, familiarise yourself with style, content, and requirements - read guidelines for authors (usually available on website).
Good luck.