Guides uses "Channels" to organize guides and who can access them. Unlike files which can only be stored in one folder, guides can be added to multiple (unlimited!) channels.
You can create your own personal channel to collect and organize the guides you use most and even share it with your colleagues. Then you'll be able to create your own guides or add guides from your account or even from the Guides open library -- which has tens of thousands of guides to choose from.
To create a channel: