[kore]

I'm getting great value out of this list.

Can anybody recommend a book that has helped them become a more productive and efficient developer?

[nadnerb]

The Pragmatic Programmer: From Journeyman to Master

[pmorrisonfl]

I'll second 'The Pragmatic Programmer' as a wonderful career enhancer. I'm reading 'Growing Object-Oriented Software guided By Tests', Pryce, Freeman right now, and think it's really worthwhile.