Sovereign is a set of Ansible playbooks that you can use to build and maintain your own personal cloud based entirely on open source software, so you’re in control.
If you’ve never used Ansible before, you might find these playbooks useful to learn from, since they show off a fair bit of what the tool can do.
The original author’s background and motivations might be of interest. tl;dr: frustrations with Google Apps and concerns about privacy and long-term support.
Sovereign offers useful cloud services while being reasonably secure and low-maintenance. Use it to set up your server, SSH in every couple weeks, but mostly forget about it.