All of the above. With two and a half hours on the train every day I read a crapload of books including (but not limited to) Scott Meyers' Effective series, Her Sutter's Exceptional series and Bjarne Stroustrups "The C++ Programming Language".
I also follow a number of websites such Herb Sutter's blog, Bjarne's webpage, isocpp, this site, AltDevBlog, stack overflow.
One of my favorite cpp videos is Herb's (my love for this guy is purely professional) Atomic Weapons.
Books mostly for me. Recently I decided to read books to see what the older books I started with missed. I've read or am reading (in order):
The Standard Library
More Effective C++
Practical C++ Programming
Data Structures and Algorithms
Thinking Like a Programmer (read it for fun)
Plan to get eventually:
More Exceptional C++
Exceptional C++ Style
C++ Template Metaprogramming
I have The C++ Programming Language Special Edition too.