C Programming

I want to become insanely good at programming in C. How should I go about this? I have a good background in C++ and Intel assembly. Where do I go from here?

>>6
You are stupid, for several reasons:
1. You suck if you can't memorize C's stdlib, it's about the smallest standard library out there
2. The reward of learning C is huge
3. A lot of work to learn C? Fale.