This will create a basic VM for local development, without crapping up your daily driver OS.
By default it sets up a copy of my PuPHPet app. Simply add an entry in local hosts,
192.168.123.101 puphpet.dev
and run $ vagrant up
and within minutes you'll have a fully-functioning VM and website!
If you wish to quickly and easily setup your own, custom Vagrant/Puppet VM, go to puphpet.com, my new GUI-based online configurator! Just point, click, and BOOM VM magic in your face!