Once you enter the Admin Tools, let's say to share a dashboard, add a user, etc, there is no easy way to get back to the Main menu or the Favorites menu. It's a very frustrating user interaction when you have to click several times to get back to the most common/used area of the product. Please make access to these (the two icons: the SC icon and the Star icon) two menu items available from anywhere in the product.
In the Admin Tools, this will mean pushing down the menu items so that the two icons are visible on the left hand menu at all times from within SiteCatalyst.
It seems like a small thing but when you're in SC all day and moving back and forth between the Admin options and report options, it can save a lot of time and frustration. As a workaround, I almost always have two windows of SC open, one for Admin, one for reporting.