How to add padding/margin for sidebar-right in Adaptive Theme?
What Geoff said is basically true, but there is a way to change the margins and the paddings without messing up your basic page layout.

The way to do it is the following:


Take a look at the structure of the HTML in the sidebar region. There should be a div that has a class .region-sidebar-second or .region-sidebar-first. If you try to change the padding/margin of this div, your structure will be messed up.
You can, however, change the margin and padding of the div with the region-inner class by using a selector like ".region-sidebar-first .region-inner" or ".region-sidebar-second .region-inner".
You can even go deeper if you want to change the margin/padding of a specific block and not the whole region's by using something like ".region-sidebar-second #blockID" as your css selector.