Relax
Relax completely before you start to study. One approach to concentration is to ask yourself, "Do study and bookwork scare me?" If you have to do something unpleasant, something that you know you may do badly, how do you react? Probably you put it off as long as possible, find yourself daydreaming, and would welcome reasons to stop studying. If you do react this way, you might be said to suffer from learned book-anxiety. The key to breaking this book-anxiety daydream series is learning how to relax. When you are physically, deeply, and completely relaxed, it is almost impossible to feel any anxiety. Associate the book with relaxation, not with tension and anxiety. When you study, study; when you worry, worry. Don't do both at the same time.