The other day, Federico asked about why people use web services such as IFTTT. I have a few of these that I use frequently, but the geekiest one is this: controlling my Mac with my car.
More specifically, when I turn my car’s ignition on or off in the parking lot at my office, Automatic triggers an IFTTT recipe, creating a text file in a special Dropbox folder which is monitored by launchd[1] and runs a shell script depending on which file is created.
It sounds more complicated than it is. No, really.