Habitica

Making a new task a fun, creative challenge helps you feel more motivated to do it. However, sometimes it’s hard to do this with every aspect of your life. And that’s where Habitica comes in. This is a website and iPhone app that turns your goals into a Role-playing game (RPG). Every time you finish a task, you’ll see how your character gains experience and even levels up.
Another great feature that Habitica has is that you can team up with other users to go on quests together. If one of the members of the group doesn’t finish its task, it hurts the whole team, creating accountability and making your partners want to force you to complete your goals.
It’s fun, creative, and it’ll help you get the job done. But, if you’re not a big gamer, or you want something a little more minimal, then the next tool might be for you.