1. uninstall all apps that aren't essential
2. turn off all notifications
3. use parental control mode to add all the websites that might create a distraction. (this will create some problems, like not being able to login to an app using Facebook Connect, or not being able to search for "hot tubs" through Google, but it's worth it). Do not ever remove websites from this list once setup, and try to add everything on the first pass so you're not comfortable messing around with parental control configuration.
4. [this step is important] forget how to remove parental control
5. meditate daily