Lots of good suggestions here already.
One of the best ways to get into good habits is to force them on yourself. For this I love PC-Lint. PC-Lint will actually enforce Scott Meyer's Effective C++ & More Effective C++ rules. Also obeying Lint rules tends to lead to easier to maintain, less error-prone, and cleaner code. Just don't go too crazy when you realize lint will often generate more output than you have source code; I once worked on a project with 150MB of source code and 1.8GB of Lint messages.
