The fastest way is to edit the actual HTML. This is generally caused by blank header and footer blocks.
Look for <span class="content_header"></span> and or <span class="content_footer"></span>
So when i set my page up everything is around the right and left and the middle is clear,what do i do to move it all closer together towards the middle?what you just said?,see most of my stuff is pictures of products,also is there a way to maybe just put text in the middle or something?cause when i add more it all goes to the bottom automaticly???