If you want to find out more about Dianetics and Scientology, the best way to do this is to read an L. Ron Hubbard book on the subject. I personally recommend you read Learning how to Learn.
This book really helped me with my study techniques and habits. In this book you will learn to study properly and why studying in the past didn't help you. You will learn all the signs that tell you, you aren't learning properly anymore along with the proper ways to find and correct where you went wrong. This book has had the most impact on my life and I believe it will have the same impact on you.