Effective Java Updated
Brush up on your Java 5 bag of tricks with this talk by Joshua Bloch based on his updated Effective Java book (can't recommend it highly enough).
A colleague of mine commented that this book has about the same information density as maths textbooks, so don't be mislead by the low number of pages - it is excellent value for money 
Uncle Bob’s upcoming book: Clean Code
Awesome - finally something to bash people on the head with when they write ugly code! 
(Ok, the "code smells" from Refactoring are a good start too but this seems more pedagogic in nature.) There are a lot of technical books out there, but few focus on good general practices. One of my favourites is Effective Java by Joshua Bloch, but it's focus is slightly more architectural and less on day-to-day coding. I love Bob Martin's writing so I didn't have to look long at the table of contents to order my copy as soon as it's available!
