Telling Amazon's Alexa to play some music or add an item to your shopping list is pretty cool, but there comes a point where you start to feel the limits of the Echo's pre-programmed voice commands. It doesn't have to be that way anymore: Amazon and the automation wizards at IFTTT just announced a new feature that allows you to create custom voice phrases to make Alexa do whatever you want. Unfortunately, there's a catch: every command has to start with the word "trigger."