If you're running a Raspberry Pi that's doing something in the background, like working as a security camera system or a weather station, then it's good to know exactly what it's up to no matter where you are. Initial State shows off how to build a dashboard that keeps you up to date and notifies you if anything goes wrong.
The project here allows you to see what your Raspberry Pi is up to from anywhere, which is handy on its own, but more importantly, you can get email or SMS notifications if something goes wrong. This way, if a security system cuts out because a power drop or whatever, you'll know right away. It's a pretty simple project to set up and the Initial State service is free as long as you don't use a ton of data. Head over to GitHub for everything you need.