Before diving into smart pointers, move semantics and other (mostly) recent additions, I would recommend getting well acquainted with the basics: RAII and commo

Before diving into smart pointers, move semantics and other (mostly) recent additions, I would recommend getting well acquainted with the basics: RAII and common patterns such as passing by constant reference. Effective C++ by Scott Meyers, as others have noted, is an excellent entry point.