VS 2010 Productivity Power Tool Extensions is a free set of Visual Studio 2010 extensions that provide some nice additional functionality. "One of the useful, features if you're using lot extensions is "Ctrl + Click" go to definition feature." "it enables you to quickly navigate to definition of a member or type within your code. You can accomplish same behavior out of the box with VS by right-clicking on a member/type and then choosing "Go to Definition" context menu item – or by moving your cursor over a type/member and then pressing F12 key. To try out "Ctrl+Click" behavior, just hold down "Ctrl" key and use your mouse to hover over a type or member in your code. When extension is enabled you'll find that this causes a hyperlink to appear under each type/member you hover over."
You can also now enable/disable each individual feature within extensions pack – allowing you to selectively choose what you want to use. Use the "Tools->Options" menu command, and navigate to "Power Productivity Tools" tree-view item to enable/disable individual features.