Warby Parker devised a new internal system, called Warbles, that lets employees nominate programming projects. Managers assign points to the tasks they think would add the most value. The programmers then get to pick the projects they’re most interested in, but they’re rewarded if they pick the ones with the most points. Teams of computer engineers compete to accumulate the most points, and after every quarter, the winning team gets a prize. Learn more at Quartz (9 minutes).