Designing from Both Sides of the Screen by Ellen Isaacs and Alan Walendowski is a very practical "How To" book, similar in spirit to Joel's book but more detailed and not aimed exclusively at programmers.

A notable feature of this book is that it skips the colorful rants about bad design and misguided marketing/engineering departments that you'll find in Joel's book or Alan Cooper's book. This makes it a little less entertaining, but if you prefer to stick to the facts, you may well prefer it. It's still a well-written book, and by no means tedious.

The book has two parts; the first is a set of general UI design principles, and the second is a comprehensive walk through of creating an instant messaging application. The walk through demonstrates the process they used to design, implement, and iteratively improve the application. Ellen Isaacs was the UI designer for the IM app, and Alan Walendowski was the main programmer. They talk about give and take between the designer and programmer, and how to balance UI goals with time, resource, and engineering constraints.

Alan Cooper's About Face 2.0 is comparable to Designing from Both Sides of the Screen in that it's a practical "How To" and reference manual, so if you want more advice on concrete methodologies, have a look.