Our collection of home-made NuGet packages :)
Simply run Install-Package NuSpec (once for the solution, doesn't matter which project) to get a set of extra cmdlets available in the NuGet Package Manager Console.
Available cmdlets: Install-NuSpec, Enable-NuSpecIntelliSense
Install-NuSpec <ProjectName> [-EnableIntelliSense] [-TemplatePath]
Adds a tokenized .nuspec file to the target project(s).
Use the -EnableIntelliSense swicth to add the nuspec.xsd to your Solution Items to provide IntelliSense.
There's not much value in keeping the NuSpec package dependency around after setting up this automation, so feel free to simply remove it using Uninstall-Package NuSpec.