Meet the Monolith Posture Coach: a smart wearable device that monitors the position of your back and neck using a magnetic sensor and gives you feedback when you slouch. It has auditory, visual, and tactile feedback systems. You will only need to use it for 30 minutes a day to get started.
The Monolith also comes with an app to track your progress. This smart wearable device is currently on Kickstarter.