r78o1k on "a-z index"

Hi. I am trying to add an a-z index to my home page of blog titles. I don't want to use the categories.

I am using the following code, but it doesn't seem to be working.
Home page code:
<a href="#gusto-queenscliff">Gusto Queenscliff</a>

And I have entered this at the top of the text box of the post:
<a id="gusto-queenscliff">Gusto Queenscliff</a>

I am very new at this!