How to open new doc tab labels on the right side in Visual Studio?

For Visual Studio 2012 and later, this setting has moved to the "Tabs and Windows" section.

Updated directions are:

1. Click on the "Tools" menu, and select "Options".
2. Under the "Environment" heading in the listbox on the left, click on the "Tabs and Windows" item.
3. Check the box labelled "Insert new tabs to the right of existing tabs". This should be the first checkbox in the panel, in the "Tab Well" section.

To instruct Visual Studio that you want new tabs opened to the right of existing tabs:

1. Click on the "Tools" menu, and select "Options".
2. Under the "Environment" heading in the listbox on the left, click on the "Documents" tab.
3. Check the box labeled "Insert documents to the right of existing tabs".