Anything in GREEN is what you would change.

To put an e-mail link:
<a href="mailto:youremailaddress@here.com">Your text here</a>

To make a link to a web page:
<a href="http://www.youraddresshere.com">your text here</a>

To make a link to a web page (in a new window):
<a href="http://www.youraddresshere.com" target="top">your text here</a>

To display an image in your post:
<img src="http://www.youradress.com/yourimage.jpg">