Styling Side Nav

I have been working on my theme for some time now. I want my “Recent Comments” and “Tags” and “Blogroll” lists to have separate styles so they can have different icons.

http://azfans.com/recent-posts/

I also want each list to have a 20px margin at the bottom to create some space between the lists.

For tags, i want the icon to be: http://www.azfans.com/2/images/tag_icon.gif
For links, i want the icon to be: http://www.azfans.com/2/images/link_icon.gif
For comments, i want the icon to be: http://www.azfans.com/2/images/comment_icon.gif

Help is greatly appreciated! Thank you!