^ Only do questions if you need to do them. Mindlessly working through 10 questions that are essentially the same doesn't help you once you understand the underlying concept.
Unless you are prone to careless mistakes like me 
How many exams did you do for methods?
And everyone is prone to careless errors.. The way to combat that is to concentrate lol. Doing too many questions makes it easier to slip into "autopilot", which is where many errors originate because you are treating a specific question the way you did in a practice one. In the exam you should really treat each question as if you've never seen one similar before.
However, having said that, in Spesh time is an issue unlike methods. Personally I tok the exams a little too slowly and finished them both with <10 seconds to spare =\ No Checking time... Whereas last year for methods I had 30 minutes spare.
So some familiarity is essential.