My first advice to anyone is to COMPLETELY STUDY the OG and the nine paper tests. Analyze these as much as you can. I feel that most of the tougher quality problems are in the last 100 of each section, but that does not at all mean that we should skip the rest. every single problem should be studied in detail.
What i would do is, as you get closer to your test day, solve the last 100 or so OG problems
at speed and see how you do.
OG is a great start, but for most guys who want to score 700 or more, you will need to work harder in the Quant section. The difficulty level of the test has changed significantly and you will need to much stronger with quant concepts. verbal remains a challenge anyway, but LSAT's can help a great deal with CR and RC. for SC, OG+ paper tests are great practise.
thanks
Praetorian