The Software Development Book
by Mark Watson
The goal of this book is to encourage the reader to step back and reevaluate how they design and write software systems. Although the book is about Software Development, it is also about working in the IT field, dealing with competition from very low cost knowledge workers in countries with very low cost of livings, etc.
Download or read it online for free here:
A guide for software source code quality. The guidelines apply to anyone who creates, modifies, or reads software source code. This document is a set of rules to follow during the implementation phase that will help produce a higher quality result.
by Terry Winograd - Addison-Wesley
In this landmark book, Terry Winograd shows how to improve the practice of software design, by applying lessons from other areas of design to the creation of software. The goal is to create software that works -- really works.
by Agner Fog - agner.org
These manuals describe everything you need to know about optimizing code for x86 and x86-64 microprocessors, including optimization advices for C++ and assembly language, details about the microarchitecture and instruction timings of processors.
by Sean Chambers, Simone Chiaretta - Los Techies
Refactoring is an integral part of continually improving your code while it moves forward through time. It is an easy concept to get started with and opens the door to better practices such as unit testing, shared code ownership and bug-free code.