I recently looked into the wonderful world of Bookmarklets for Firefox. Basically they are bookmarks with javascript functionality. Since I make use of the same sites over and over I figured making a few bookmarklets would be a smart idea. Here are a few of mine:

You can install these by dragging them to your bookmark toolbar folder or copying the link and pasting it into the Location box for a new bookmark. In these Bookmarklets they will prompt you for input or they will utilize whatever you currently have selected in the browser. On occasion this can bite you in the butt. Enjoy them.