You can format your text and paragraphs using textile formatting.
Textile is a traditional markup format that looks like this:
*bold* for bold
h1. for a big Header 1 line
"link here":http://link_url for a link
Textile also allows you to type plain text with paragraph breaks and http:// links, so it a good way to start using markup, and we use it as a default.
Click Here for more information for textile formatting