I am presuming this is a style question, and that it has a name. I presume there is a place to learn about it, such as 'Elements of Style' however I don't know what it is called, if anything, which is why I am asking.
I recently learned of the idea of writing out, in longhand, good copy, for thirty days, in order to unconsciously internalize some of the concepts of powerful copy-writing.
My specific question has to do with capital letters in a sentence. In the back of my mind I seem to recall the idea that one should not capitalize all letters.
If that is true my instinct is to write this headline...
"The Amazing Money-Making Secret Of A Desperate Nerd From Ohio!"
...In this way
"The Amazing Money-Making Secret of a Desperate Nerd from Ohio!"
...Is this a rule, if so what is it called, and how do I learn about it? Or am I just completely off track?