Have you ever wanted to check out a feed on Google Reader before subscribing to it?  If you add a bookmark with the following code and click it when an RSS feed is available it will allow you to do just that.  This comes in handy if you are curious if the feed contains images or is just headlines without any text, this has saved me from subscribing to some less useful feeds.

Bookmark Code (copy and paste):

javascript:var%20b=document.body;if(b&&!document.xmlVersion)
{void(z=document.createElement(’script’));
void(z.src=’http://www.google.com/reader/ui/subscribe-bookmarklet.js’);
void(b.appendChild(z));}else
{location=’http://www.google.com/reader/view/feed/’+encodeURIComponent(location.href)}