I usually would walk my dog first, make a very structured by the “time of the day” in 20 minute intervals and then I would take a five minute break. Look up tomodoro method if you havent before, helped me get theoufh engineering school
I have to work on computer for veryy long hours non-stop. Three things help me on this: 1) Television (programs that cannot distract me but I somehow like the sound of), 2)Radio (that plays in not my mother language, and somethings that I like), 3)changing my location (when I feel too overwhelmed, I pick my everything up and go to another desk, to sofa...etc) :)
I associate lofi music (lyric less and soothing) with working and studying. As long as it’s on I’m working. I turn it off for 20 min breaks and try to do something physical, like using a dumbbell for a few reps or pacing or LIMITING myself on tiktok. When taking notes I use the Cornell method plus highlighters and symbols. Break it into hour chunks i know i can’t sit still for two hours straight lol.
Breaking long hours into 3-4 chunks with pre-setted rewards (like eating a chocolate bars) really helps me. Put the reward into your site, and each time you see it it will keep you focused for this chunk of time :)
If you print things out, try neon or colorful printer paper. Keeps adhd eyes engaged for longer. Even if it’s just a reading that’s a pdf, it helps me to print it out rather than reading from the screen.
I need to leave my phone in another room, and when writing notes I try to make it more «fun». When i studied for my anotomy exam I had almost no normal notes in a book. Instead I made flashcard. That way I went through all the material and made both a question and an answer. Didn’t really use them much afterward and it took some time, but at least I read and wrote notes. So finding a way to make it more playful to do school