Can I just add: In addition to this, if you struggle with anxiety or have some sort of ADHD, then try cutting out caffeine entirely . Not just switching to "decaf" (which isn't), but cutting out tea and coffee, and switching to an alternative like Barleycup. Doing this has had a massive positive effect for me, and combined with decent nutrition and daily exercise, has been wonderful.
I'd add that my ability to sleep naturally was negatively affected as side effect of medication. I tried a various combos to induce sleep and found the best solution to just be... exercise.
No caffeine, exercise, sleep lead to a significantly reduced anxiety and more.