We all make typogarphical mistakes. Oops. Put the caret between the 'a' and 'r' and hit Ctrl+T.
This shortcut allows you to move a single letter one position to the right every time you use it. More precisely, it swaps the characters on the left and right of the caret, then advances the caret one character to the right. The advancement of the caret means you can keep hitting Ctrl+T to effectively move a single letter right through a word.
Sometimes I'll type in a class name without declaring the corresponding import statement at he top of my C# source file. Visual Studio adds a visual clue (small red box under the final character of the type name) and if you move your hands off the keyboard and wiggle the mouse around a bit, Visual Studio will display a context menu to choose the namespace. If you want to keep your hands on the keyboard, hit Ctrl+Shift+F10 and then hit the up and down arrows to select the appropriate namespace from the list.
Some other shortcuts can be found here: http://www.microsoft.com/downloads/details.aspx?FamilyID=e5f902a8-5bb5-4cc6-907e-472809749973&displaylang=en