With the exam coming up on Monday, I've collected together a few of the revision tips from 2012, 2011 and 2010 here. Hopefully, they'll help you target your last day or two of revision:
Tips from 2011
Revision tips from 2012 (BTW World Englishes has cropped up now as a discourses question in Jan 2013)
General ENGA3 exam advice from 2012
I'll add a few more bits and pieces on Sunday, if I get a chance.