Much depends on the stage of your PhD studies. At the initial stage, keep a good <st1:place w:st="on">OB</st1:place> textbook, apart from all the worthy recommendations sent so far.
At a later stage in your PhD you should surely aim to publish and to do that you need much learning, both on 'how to' and on understanding 'the name of the game'.
As for 'How to' – perhaps the best is:
Huff, A. S. (1999). Writing for Scholarly Publication, Thousand Oak: Sage.
In learning the system of how to publish, May I recommend:
Baruch, Y. Konrad, A. Aguinis, H. & Starbuck, W. H. (Eds.) (2008). Opening the Black Box of Editorship. <st1:place w:st="on">Basingstoke</st1:place>: Palgrave-Macmillan. ISBN: 978-0-230-01360-5
And the first step in the learning process is reviewing other's work – see:
Baruch, Y. Sullivan, S. E. & Schepmyer, H. N. (Eds.) (2006). Winning Reviews: A Guide for Evaluating Scholarly Writing. <st1:place w:st="on">Basingstoke</st1:place>: Palgrave-Macmillan. ISBN: 1-4039-9223-1
I consider these three as essential for any PhD student in the later stage of their studies.
Yours
Yehuda
Professor Yehuda Baruch
Editor, Group & Organization Management
Norwich Business School, UEA, UK
Tel -44-1603-593341
Fax -44-1603-593343