I write a number of TFS Plugins, meaning I end up referencing all sorts of TFS assemblies. This entails trawling through the various client and server installation directories trying to find the particular dll I'm looking for.
As I like my projects to build without needing to install any extra dependencies manually, this means either I include the files when I check into source control, or more recently I manually create a NuGet package for each dll and put it in my private repository.
Since I also have a habit of updating to the latest version of TFS often I also find that I need to repeat this process quite often - finding all these assemblies, creating NuGet packages, then updating my plugins and redeploying
I finally got sick of it enough to write a small powershell script to find any assembly starting with Microsoft.TeamFoundationServer.* and create packages, including package references to other packages.
This script should also work for other products like SharePoint with a few tweaks