Adding the millionth opinion for exercise. All my life I was like no, I'm fine, I'm in good shape and don't need to exercise, that isn't my problem. I was entirely is disbelief it would have any impact. However, it's become super obvious to me that it does make a huge impact for me.
Adderall is also a massive bonus to my well being and ability to do work, but it's not sustainable for me. I have to up the dose every couple months until I'm at the max dose, and at that point my heart feels like it's going to explode every day. And then quitting adderall is awful and takes forever to not feel super tired 24 7 (like half a year).
Ever since I turned 30, my approach to productivity has been this: If I find myself having trouble to encourage myself to do something, it's probably not actually that important to me. So I don't do it. I still keep the house clean, force myself to exercise, and other basic things. But I don't beat myself up over doing nothing, by not studying for some theoretical promotion it may bring me, or drinking or doing drugs (but no in excess). I accept that I will have passing interests in hobbies and then drop them after a month or so. I don't beat myself up over it - it was fun to try. Then I move on to whatever else I feel compelled to do, which often times is nothing.