Technology--at least in theory--is improving our productivity, efficiency, and communication. The one thing it's not doing is making us happier. We are experiencing historically high levels of depression and dissatisfaction. But it doesn't have to be that way. Technology can drive--not diminish--human happiness.

Our brains receive 11 million bits of information every second but can only process 40 bits at any given time. Thanks to the latest technology, you have a say in what information you consume. We now have the tools to train our brains to scan the world for the positive, trumping...