How to do a critical discourse analysis (CDA)Watch this thread
Thanks in advance!
Fairclough, N. (2009) 'A dialectical-relational approach to critical discourse analysis in social research,' in Wodak, R. and Meyer, M. (eds), Methods of Critical Discourse Analysis. 2nd edn. London: SAGE. pp. 162-186.
Fairclough lays out a step-by-step process for CDA which I tweaked a bit for my particular needs. If you don't get on with his approach, one of the others in the book might work better for you.
For identifying discourses, the best thing is to familiarise yourself with the prevailing discursive representations of whichever topic or issue you're focusing on, by looking at previous scholarship. Then you know what you're looking for to some extent, and you'll also be more aware when you see things in the documents which *don't* fit neatly into previously-studied discourses.
Fairclough's 'Language and Power' is also a good general text to look at, as is 'Discourse is Data: A Guide for Analysis', edited by Wetherell et al, which if I remember correctly includes an example of Fairclough-style CDA.