If there's anyone qualified to write a self-help book on success, it's Jack Canfield, who's worked his way from scraping by as a teacher to holding a Guinness world record for having seven books simultaneously on The New York Times® Best Sellers list.As a coauthor of the Chicken Soup for the Soul® series, he's sold more than 80 million books, and now lives ''in a beautiful California estate'' with his days of dining on spaghetti and tomato paste long behind him. ''All you have to do is decide what it is you want, believe you deserve it, and practice the principles in this book,'' he says, and success is yours.His advice is straightforward (examples: ''reject rejection'' and ''surround yourself with successful people''), but rather derivative, with quotes from the likes of JFK, Colin Powell, Aldous Huxley, and fellow motivation author Napoleon Hill.Canfield's definition of success is primarily monetary, and he includes plenty of anecdotes depicting average folks who saved themselves from the brink of bankruptcy after following his principles. He could tone down the braggadocio; readers don't need to know that he's stayed in resorts in Hawaii, Italy, Australia, and Morocco. Despite those gripes, his cheerleader-caliber enthusiasm should benefit anyone looking to improve their lot in life. — Erica Jorgensen