CR was my worst area. The secret there is concentration and becoming familiar with the type of problems. Also develop a good strategy to not waste time - i like looking at the questions first and answering them in a random order to be as efficient as possible.
When i took the SAT for the first time, I got a CR of 700, and I honestly was shocked.
The second time around, there was a moment where I was out of focus and lost track of time, and I had the worst feeling about it for weeks. What do you know, my score shot down to a 600. Good thing superscores exist 
So yeah, concentrate and really try to block out mental distractions for that one.