Running VirtualBox in Headless Mode with RDP

A quite annoying bug while using the VirtualBox 5.1.x release, apparently caused by Qt5, has forced people that use Tiling Window Managers like me to look at alternative ways to keep on using VirtualBox until a fix has been released. Luckily, VirtualBox has a quite excellent Headless Mode that not a lot of people know about. It is also pretty trivial to start using it:

1. Download and install the VirtualBox Extension Pack
2. Enable the Remote Display Server, either via the GUI (Display -> Remote Display) or running VBoxManage modifyvm "VM name" --vrde on
3. Start your Virtual Machine (VM) in Headless Mode: VBoxHeadless --startvm "VM name" --vrde on
4. Connect to it using your favorite RDP viewer: xfreerdp +clipboard /w:1920 /h:1080 /v:0.0.0.0:3389
5. Read the documentation on what else is possible with VirtualBox Headless Mode