This book describes techniques for improving mental abilities such as general intelligence, attention control and impulse control, information processing speed, reading and writing performance as well as understanding and getting along with other people. Some aspects of emotional intelligence are also covered, such as anger management and regulation of mood. Most of the proposed methods are temporary lifestyle changes such as "smart diets" and hydrotherapy (brief cooling or heating of the body). The proposed techniques can help the readers to slow down or to speed up their mental processes when necessary, or to lift or lower mood as needed. Most claims in this book are supported by theoretical evidence and the author's personal experience (a healthy subject); about one half of the claims are directly supported by previously published scientific studies. The author's academic transcripts and test scores have been documented and can be verified independently. A more detailed description can be found on the Amazon.com webpage of the Kindle edition of this book.