Online automation platform IFTTT (which stands for if this, then that) has support for Android Wear, and it can be incredibly powerful once you dig in. IFTTT connects hundreds of services and platforms, including Android Wear. You can create recipes that use your watch as a trigger (if) or an action (that).
For example, IFTTT can create a button on the watch to toggle your phone's Wi-Fi, send a text message, turn on your Philips Hue lights, and more. IFTTT can also be set up to ping your watch when it's going to rain, when a certain device connects to your Google OnHub router or anything else that's supported by the multitude of IFTTT channels. The sky's the limit with IFTTT and Wear. Best of all, it's free.