Dale Carnegie needs no introduction. This is the best self help books u can read to have a healthy and happy life. If u worry too much and kind find a listening ear every time u should go for this book. It really helps in overcoming the worrying for everything problem. The best part is it is so practical to apply to everyday life. It goes step by step and shows the best way to live a happy life. Also u can read how to win friends and influence people by Dale Carnegie.