IMO, the best thing is to get a "Teach yourself C programming" book and the latest SDK. Its been ages since I cracked open any C code, so I'm reading my book again. Pretty much alot of stuff works but some stuff doesnt. ie. some header files are not the same ones like used in standard C, no graphics.h, dos.h etc.

The SDK is very well put together. Scribble works great and I love that standard UNIX shell commands like ls, cp etc are included with it.