Now here is a book I really do like. Generally I avoid "self help" books, seeing myself as mostly beyond help - especially from myself. However, having spent a while last week in the Tech-Ed bookstore reading this one and trying to make mental notes of all the good tricks presented in this book, I eventually cracked and bought a copy. And it is jolly good too.
It is broken down into chapters that deliver tips to improve your life. It starts with email and then move into data organisation, using the web effectively and even how to motivate yourself to get work done. None of it is really rocket science I suppose, but you have to know these things to be able to use them. For example, I didn't know that Outlook has an option that lets you display all email sent only to you (as apposed to a list with you on it) as blue. (Tools->Organise->Using Colors). You can also flag messages from different people in different colours.
You can read the book from cover to cover and try to remember everything, or you can dip into it at random in the sure knowledge that you will learn something useful. The content is based on material presented over the years at lifehacker.com and covers Windows and Mac platforms, along with good old common sense.