Page margin

Hey!
Something is bugging me all the time and I don't see how I can fix it.
This is a screenshot of my forum how it is right now.



There is no margin between the words "Statistics", "Who's Online" or the forum boxes and the page.

I edited the screenshot with a photoprogram and this is how I would like it to be:



You see? I don't want the text and the boxes to start where the white page starts. I want a small margin.
Can you help me?

Thanks

This all depends on how big the forums are I think, all the forums are based on going in the middle. So if you have huge forums, there will be no margin.

If you get what I mean :S