line breaks

Perhaps this article is what you are looking for:

http://wpbtips.wordpress.com/2009/06/10/formatting-text-pt-1/

or perhaps this:

For first line indentation:
<p style=”text-indent:.5in;”>YOUR_TEXT_HERE</p>
(you can adjust the number)

For extra space between paragraphs:
<div style=”height:20px;”></div>
(you can adjust the number)

Simpler (non-adjustable) alternative:
<div> </div>