VS 2010 has a new “start page” that displays by default each
time you launch a new instance of Visual Studio. In addition to
displaying learning and help resources, it also includes a “Recent Projects”
section that you can use to quickly load previous projects that you have
recently worked on:
The “Recent Projects” section of the start page also
supports the concept of “pinning” a link to projects you want to always keep in
the list – regardless of how recently they’ve been accessed.
To “pin” a project to the list you simply select the “pin”
icon that appears when you hover over an item within the list:
Once you've pinned a project to the start page list it will
always show up in it (at least until you "unpin" it).