Links and Navigation in Individual Posts

I have just started a few different blogs. I have created categories along with links to static pages on the sidebar. On individual posts, however, there in nothing in the sidebar. For example, see my post at
http://shoppingmatchmaker.com/gift-ideas/?p=28

How can I get my categories and links to show up? I have searched around and asked around. I suppose the solution is something simple, but I can not find it.

Thanks in advance.