The concept behind Forest is pretty simple but hopefully effective. Using it either as an Internet browser extension or app, you list certain websites not to visit for a certain time limit. As soon as you start, a virtual tree begins to grow. If you stay focused and don't leave the app or visit a blacklisted website, the prettier your virtual tree gets. The moment you exit the app or visit a website, your tree withers. It's a great way to stay on task and in the moment.