Learning Imperative Programming

Heya /prog/,

For years I've programmed in an object-oriented fashion with C++, but I'm becoming more and more interested in using straight up C instead. After all this time using C++, I'm not quite sure how to approach a complex problem without using objects. Is there any kind of resource you can point me to that will help me learn the best way to structure my C code?

>>9
CLISP is so imperative that Pascal programmers spit at it.