For those of you who may not have noticed this, I wanted to mention a sometimes-overlooked feature of adCenter: the horizontal navigation links (also known as "breadcrumb" navigation), right underneath the Microsoft adCenter logo on the top left-hand side of the UI. Click the green arrow next to the ad group or campaign in the horizontal navigation list, and additional navigation links will appear in a drop-down list. These links allow you to navigate within the hierarchy and can save you clicks while you're moving between campaigns and ad groups -- you can click right to the ad group or campaign you want to review or edit without going back to the home page.
Here are some example screenshots.
Ad group list:
Campaign list:
I hope this helps save you some clicks are you're managing your adCenter campaigns.