Here is a collection of tools/plugins/utilities that allow you to work even more efficiently with VS2010. Here are the three that I install with VS2010. While you’re at it, take a look at the Visual Studio Gallery, you’re sure to find something interesting!
Visual Studio 2010 Pro Power Tools
Newly arrived, the Pro Power Tools offer better tab management (by project, color coding, scrolling, stacking, …) as well as search in the Add Reference menu, which is quite nice, and I even noticed an improvement in the performance of this dialog.