Countless books teach you the mechanics of magic, but very few teach how to develop your occult mental abilities so that you can perform magic effectively.
Before you perform spells and rituals, you need to develop your mind's muscles. Without mental preparation, you'll just go through the motions without any results. Everyone, regardless of experience or traditions, can learn from these exercises and gain the mental focus to make your magic much more effective.
Donald Tyson provides twelve chapters that each cover a different topic or type of occult skill—such as concentration, meditation, scrying, astral travel, and aura manipulation—and why it is necessary for better magic. Within each chapter, you'll find ten exercises to help develop the corresponding topic or skill. Magic comes from the self, and you need to work on yourself before you can cast spells that work. This book has everything you need to do serious magic.