Want to-do list
Productivity "hacks" SUCK. It is not news, that you already know how to be productive. Remove distractions, carve out some time, and bite the bullet.
This approach can be a little depressing though. And I struggle with it, I am always desperate for some way to trick myself into doing more work instead of playing another 6 hours of Pillars of Eternity. One thing that one of the members of GTO Club mentioned a long time ago was instead of having a "to do" list, they had a "want to do" list. It is not exactly a productivity hack, but it might help you reframe the items on the list just enough that it doesn't feel like a grind.
Changing my long list of things to do this week into a long list of things I want to do this week was pretty neat, I'd recommend it.