Practice doing the sections with less time. A lot of people I know couldn't finish the sections in time. Sometimes the easiest questions are at the end of the section which means if you get stuck on a question do not hestiate to skip it and finish the section. Go back later if you have time.
Don't be afraid to miss some questions. It seems like you can really bomb one section and get a 80%, two sections and get a 70%. For example, my friend got low 30's in verbal and didn't finish the math section but still got 85% overall.
Besides that try Kaplan books and anything else that is out there.