I've found that the things I procrastinate most are things that have high "activation energy", for lack of a better term. Getting off my computer, getting to my car, and driving to the gym takes a lot of up front willpower, even if I find the actual working out enjoyable (or at least tolerable). The approach that I take to resembling a functional adult is to make small adjustments to my routine that significantly cut down on that activation energy. To use the gym example, I started showering at the gym. Every day, after work I go to the gym to shower. Some days I don't have the energy or time to work out, but I always show up, grab my gym bag from my car, go to the locker room, and shower.
That way, it's not a question of "do I have the energy today to go to the gym and workout?", it's just "do I have the energy today to workout while I'm at the gym anyway?", which is a much lower bar.
I do this as well. I do almost all of my writing in coffee shops or any place that will let a dog with a laptop hide in a corner. I'm When I'm able to leave the house, I'll hang out somewhere. Writing doesn't have to happen. Tonight, I'm on HN instead of prepping my D&D game. :)
My version of this is to have a kettlebell at my feet in my office. I'll naturally bump into it a couple times a day usually, and I go "oh why not" and pick it up and do a couple quick exercises with it.
Another way to do things that have high activation energy is to have pets you love that will get excited at a specific time of day and be very disappointed if you don't follow through with it (take them on a walk). I've gone many times when I feel like I didn't have the energy just because they deserve it and I don't want to let them down.
Congrats you have somewhat hacked your ADHD or similar mental issue.
It's related to executive functioning and is limited so lowering the bar like you do works well however those tricks usually decay over time or become habit at which point one is not thinking actively anyways.
That way, it's not a question of "do I have the energy today to go to the gym and workout?", it's just "do I have the energy today to workout while I'm at the gym anyway?", which is a much lower bar.