Writing clean code in C

So how do I do it?
C is supposed to be a good and fast language, but all the programs I make end up being clusterfucks of unreadable code

Read the code of C masters.

(Extremely) High quality C codebases include:
nginx
SQLite
qmail
dovecot

Alternately, since I myself am a C master, post your self-contained code here and I will rewrite it in an idiomatic style.