CNN is only useful for quickly ascertaining the tone and content of a particular day's propaganda, and even then only on their website.  That anyone actually watches the TV channel baffles me. 

But you can get a good daily rundown of what the masses are to be spoonfed by glancing at their home page.  Generally, it breaks down like this: 

1) A few silly stories just to distract you

2) At least one salacious story to activate the reptilian brain

3) A story designed to show how evil the Iraqi resistance is or, alternatively, how good and noble is our military (Today 2 and 3 are combined into a story about Lynndie "The Torturin' Pornstar" England's conviction.)

If you want real investigative journalism -- or even a halfway accurate semblance of accurate news -- you'll never find it on CNN and seldom in the mainstream media as a whole.