Reddit reviews Designing Web Interfaces: Principles And Patterns For Rich Interactions

Designing Interfaces is great, and I find myself coming back to it when I'm stuck on something. I should note, however, that the examples focus primarily on desktop applications. It's not a stretch to apply most of the concepts to web apps, but some of the patterns aren't really applicable. However, I primarily do web work and I still think it's worth getting.

A classic Web usability book that's really easy to get through is Don't Make Me Think. Much of what makes for good web design is common sense, but it's nice to have it reinforced/verified.

If you're interested in site architecture (you should be) or some theory behind decisions behind visual design (particularly regarding heavy information), I'd also recommend The Information Design Workbook. Half of it is theory and the other half is examples and case studies. It also has some really nice guidelines for working with clients, such as "What is a design brief? Why do I need it? What should be included in it?"

Designing for Interaction is alright... The interviews in it are interesting, but the subject matter is pretty basic. That being said, it is a good primer. I'd definitely pick Designing Interfaces over this, though, if you're choosing between them.

I've heard good things about Designing Web Interfaces, but I haven't read it myself, so... I can't personally recommend it. (O'Reilly generally has pretty high standards, though, so it's probably a safe bet.)

I'd second useit.com and smashing, but sometimes, nothing beats books.

(If you're interested in getting more into the psychology of it, or are interested in a specific topic regarding UI/UX, let me know, as I have more recommendations... I just don't know what you're interested in.)