Hi,
you probably know this -- you're going to create some nice class, you think about it a little, maybe even draw a little UML here and there and then you're ready for implementation. You create header files with member functions, maybe even some member properties.
And now comes the dull work -- rewriting everything into .cpp file. It's true using stuff like Visual Assist can shorter this task but still -- do I really need to do this? Is there any tool / addin / direct functionality in Visual Studio which does this for me? You know, something like right click on header file in Solution explorer, "Create new .cpp for this header file".