How to align text, DIVs, objects to top of an widget

Hi all,

I’m building some custom widgets and on two different widgets, because they each don’t fill the box, I want to align everything at the top. I can customize the CSS class template-contents though, e.g.:
.template-contents {
margin : 10px!important;
But this changes the class for all widgets.
Is there another way to align all contained objects on top within a widget?