If you use NuGet package sources, you will need to add a new package source to your preferences in Visual Studio. In VS 2012 and 2013, this is under Tools –> Options –> Library Package Manager –> Package Manager Settings –> Package Sources). If you want to try out a cool new trick:
Ctrl + Q package sources Enter
Now click on “+”, type in a name for your package source. You can use either a UNC share path or, if you have hosted your NuGet packages on a NuGet server, you can enter a URL.
Now go to the NuGet Package Manager (Ctrl + Q, nuget package manager, if you’d like) and you’ll see your new package source listed right under nuget.org.