How do you manage your hyperfixation and time blindness in order to be productive for the day?

I have horrible HORRIBLE hyperfixation and time blindness. I mean like to the point I'll be on my phone for 7 straight hours and have starved myself and not had any liquids the entire time. Half the time I realize this at 8pm at night and have failed to eat breakfast, lunch, or dinner. I have zero regulation skills for removing attention away from whatever I'm interested in. Every night I plan to be so productive the next morning, and every morning I fail the moment I touch anything electronic. I automatically hyperfocus and get time blindness. Even timers haven't worked for me.

The only thing I can think to do is create some type of self imposed rule where I shut my phone off until x time or not touch the TV until done all things. Has anyone else had to do something like this just to be able to actually be productive and do things? Because they literally cant otherwise.