How can I improve my PSAT scores?

To improve your scores you should visit the SAT's website which is www.collegeboard.com. They have practice questions and everyday they post a question based on the SAT's in their "Question of the Day" section. You should also buy some books such as Tooth and Nail for the SAT Reading portion. It helps a lot with commonly used words in the SAT. Another good book is 10 Real SATs and The Official SAT Study Guide.