This might sound pretty laughable but seriously try a standing desk. If you have a bookshelf or something that you can prop a laptop on to just try it without b

This might sound pretty laughable but seriously try a standing desk. If you have a bookshelf or something that you can prop a laptop on to just try it without buying anything, do it. I find that when standing I'm able to get my brain to engage in problems or boring work that I otherwise wouldn't do and would instead avoid and watch YouTube. The ability to fidget and move around (calf raises, jumping in place, pacing back and forth), and not having the ability to sit back and relax has actually made a huge difference in my productivity. It's also important to not do leisure activities like watch YouTube or browse reddit at the standing desk. Make it a work-only space. Another thing to consider is ADHD and the emotional wall. When confronted with the idea that you have to do 3 hours of unit tests it seems daunting to start, because it's going to take so long! Instead, start by doing 3 unit tests (or something that will take 15 minutes). Even if that's all you get done today, do 3 again tomorrow. If you can make it through a much smaller task you'll likely have the momentum to keep going. And even if you don't, that's okay because you made some progress and can do a little more tomorrow.