Read! Try looking at the website iasplus. Log on to http://www.accountancyage.com and read. Read whatever you can find in technical articles for P2. Read past exam questions to see the style of answering a current issue question.
But think very hard before you try a current issues question – in a multi-part question 2 or 3, it tends to be easier to score a pass mark than it is in a 45 minute discussion question.