The only thing that really works for me is when I make it a 25 minute hyper-focussed challenge: Set a timer and make the maximum progress that is theoretically possible in that time. No getting water, no toilet breaks, no looking at the phone. Beats 3 hours of getting a glass of water, toilet breaks, getting hungry, realising I should work out and shower first and finding more reasons to jump up any day - surprisingly. Got to always treat it as if it were a competition.
You've done good, bro. Are you getting near retirement? I've thought about going back to school and doing it right this time too.
Got about twelve to fifteen years to go depending on circumstance. Been working for forty years as child labor laws weren't so strict when I was young. Pretty tired and not sure how I'm going to endure the home stretch.
If I ever go back to studying, it definitely has to be from home. Might even have worked out the first time then. Over 50 % of my energy went into the logistics of being at a specific location at a specific time with coursework done, and picking up the course certificates. Yes, I did all the courses for an intermediate diploma and more (back before BSc and MSc was a thing), but failed in picking up 20 % of them before they were destroyed.