1. install vagrant
2. install virtualbox
3. create new vagrant env (create new dir, maybe /Users/scott/vagrant/centos for a centos virtual machine)
4. initialize a vagrant instance in that directory
5. modify the new Vagrantfile to use virtualbox as your virtual machine type
6. create a bootstrap.sh script in this new directory
7. configure the Vagrantfile to use the bootstrap.sh on full boot
8. add commands to the bootstrap.sh to help build your environment