C++ standard library - when should I use it and when shouldn't I?

Question

I was wondering how often people actually use much of the standard c++ library, particularly the stuff in the and

Answer 1

When should you use the C++ Standard library? When it provides a function you need.

It's known that some things like for_each aren't supported terribly well by the language- that's what lambdas are for in C++0x.