Testing our applications is something we all do. Ahem, rather, it's something we all *wish* we did. In this chat, I'll introduce you to Behat (behat.org) (version 3!!!!): a behavior-driven-development (BDD) library that allows you to write functional tests against your application just by writing human-readable sentences/scenarios. To sweeten the deal these tests can be run in a real browser (via Selenium2) with just the flip of a switch. If you asked me to develop without Behat, I'd just retire. It's that sweet. By the end, you'll have everything you need to start functionally-testing with Behat in your new, or very old and ugly project.
Clipping is a handy way to collect important slides you want to go back to later.