Another HTML quiz

Does anyone know how to give more spaces for the area between posts?
Also for those that were made on the same day?

Look here.. My posts are chaining.. There should be more spaces there, right?
Which one is the HTML codes section for that one?

In the mood... In the mood.... ^_^

HTML for Dummies

Hoooray...!!! ^_^

Hehehehe...
It's fun...! So damn fun...!

(padahal bisanya juga baru gitu doang...)