In VS 2008 (and prior versions as well I believe) when in the code editor there are 2 comboboxes at the top of the editor. On the left is a Class Name combobox and on the ri
An alternative way would be DPack (a free Visual Studio add-in). It allows you to navigate very quickly.
What you should first look at is Alt + U and Alt + M keyboard shortcuts, although I recemmend you going through it's options and looking at DPak's website for a brief overview.
Personally I love DPack and it's the 1st thing I add to my VS (with ReSharper right after it ;-)