As for most of us know that Google treats the links that are published on Delicious.com higher on search results as compared to normal result links. For that we all must have a delicious save button on our blog. Moreover this is so far the best online bookmarking site.
One Step Tutorial:
Place below code where you want to display your Delicious Save Button:
http://delicious.com/post?url=<?php the_permalink(); ?>&title=<?php the_title(); ?>
And if you are not using images in your excerpts and want to add it too automatically, then you can use below code:
the_permalink(); ?>&title=<?php the_title();
?>¬es=<?php the_excerpt(); ?>