If you have been working on Drupal creating websites then I am sure you must had a need to clone or duplicate a node. Let me give you an example. These days I am working on a website for one of my client where we need to display electronic house hold products like Water Heaters, Ventilation Fans, Cooks Tops etc. Now most of these products in the same category have similar attributes but only difference in size or color. Now when we add a new product it is a pain to fill all the fields that contains the product specifications. I thought there must be a way to clone it.
Here is another small tip for designing drupal website. When you develop sites in drupal you be definitely need to modify the existing css file of the theme you are using. my suggestion is don't mess much with the original theme. Keep it as it is or change it only when you really have to.
Just create your own css file, lets say we call it MyOwn.css and write your code in it. Then edit the .info file of the theme you are using and add the following line in it.
stylesheets[all] = style.css
stylesheets[all] = ribbon.css
stylesheets[all] = aggregator.css