Hyperfocus tips
It's actually really easy to focus. You just need to shape some things around that. Only discipline never works.
How I use it
I reduce visual and mental distractions before I start working.
Example
Outside the house - library or cafe (not too loud), THAM set, silicone headphones or earplugs, cap on (narrower FOV - less distractions) and sitting in the corner facing the wall.