I've been reading my book, Unix Network Programming. I studied all of the basic material and the advanced topics that are pertinent to what I want to do. I am going to be working with Mac OS X divert sockets, which are a type of raw socket. I also learned about inter-process communication, which I think I'll be using. I am going to develop software that involves a daemon running in the background and a GUI client program that affects the daemon's behavior. These two programs will have to be able to communicate with each other.

I ordered another book, Core Mac OS X and Unix Programming, which covers a little bit of everything as far as Mac OS X is concerned. It even has a couple chapters of C programming "refresher" that I desperately need (considering that I never have really learned a lot of the stuff in the first place). The book also includes information about CVS, compilers and debugging, exceptions and signals, and a bunch of other important-to-know things.