One of the first customization I made to my blog was to add a favicon. A favicon is an icon left to the URL in the address field of the browser.
On the web site http://www.favicon.cc you can generate an icon from a picture. It is easy to include it on the web page. Add the tag <link> (with necessary attributes) within the <head> tag of the html page, for example:
<title>Peter Nilsson’s .Net Blog</title>
<link rel=”shortcut icon” href=”http://www.peternilsson.me/favicon.ico”/>