The Productive Programmer by Neal Ford, ISBN 0596519788.
This is a terrific book for boosting your productivity in two areas: how you work, and how you code.
The first section of the book, Mechanics, focuses on tools you can use to boost your productivity as you're working with your system. Ford launches off into an exploration of lots of little crazy tools that help you automate or ease repetitive tasks. You'll find lots of goodies from virtual desktops to shortcut tips/launchers, to using Ruby to script everything from splitting up SQL to automatically sorting your laundry and washing it for you.
All these little tools and tricks add up to drastic decreases in the amount of friction you're forced to suffer through while doing your daily job. Cutting this friction lets you focus on the job at hand, instead of trying to bend your environment to your will.
The second section of the book, Practice, discusses ways to speed your development. There's an awful lot of goodness in this portion of the book, ranging from re-emphasizing critical aspects of object oriented programming, to object and method composition. Ford walks through a lot of great stories meant to get you to re-evaluate why you do things a certain way. The infamous Angry Monkeys story gets pulled out as an example, and Ford also concisely covers development principles like the Law of Demeter, Occam's Razon, and his Polyglot Programming meme.
The book's concise, amazingly well written, and a definite must-have for your bookshelf.