My study tactic was, no studying at all. Unfortunately I was short on time, was interning fulltime during the summer and taking two courses at college all at the same time and I had to take the exam at the end of the summer. I was lucky enough to get a decent score and get over the required score I needed for the program I was applying to.
I would recommend strongly that you set out a good study plan for urself. Hopefully someone on gs can help more.