TL;DR: Clone Ansible for Play Framework to automate the task of deploying Play 2.x projects from a git repository into an EC2 instance.
As many developers I'm not a good sysadmin. That's why I was happy to see the raise of PaaS like Heroku, which facilitated deploying a webapp without having to spend time in sysadmin tasks which I didn't know how to do correctly and which took me too much time.
Last week I was experimenting a bit with Redis and its Publish-Subscribe module. The idea was to try to implement a chat with it (something I'll need for my next project) and from all the options I evaluated this seemed the best. Loving Redis so far, whoever called it the swiss-knife of databases was completely right.