I also make lists, it helps so much.
I haven't always been able to manage stress well, and have totally broken my mental health before so this is all learnt behaviour.
I walk, every day, unless I run. It's absolutely crucial to have exercise, daylight and fresh air every single day. I would sooner work until 10pm then skip my lunch break.
I prioritise my physical health, as I've neglected that under work stress before. I always eat three meals a day, and they are almost always nutritious (at least 80% of the time). I always have water with me, in the car, on my desk, by my bed. I take a multivitamin.
I have a very clear split between work and home. Even when I was working from the kitchen table I put my laptop away, out of sight, out of work time.
Lists are crucial. I find it much more helpful to write them on paper than in my phone. It's so important to get things written down to avoid forgetting and panicking. I use notebooks rather than bits of paper so I don't lose it.
We have a household budget, which we revisit every month. It's connected to our bank accounts. It's an app called YNAB and it's amazing. Since we have used it we are better off, stopped arguing about money completely and we feel in control because we understand the consequences of every choice. Before we used to panic at the sight of an empty bank account.
There's a meme going around, I think it's from TOMM, which is all about 'be your future friend' and I am very into that. I make my bed as soon as I get up so I have a nice bed to get into at night. I tidy as I walk around. I love saving future me little jobs.
Like I said, this is all learnt behaviour. I used to feel like I was barely keeping my head above water, was always feeling panicky at work about what I'd missed, worried I'd get another letter about being in my unauthorised overdraft, was underweight from barely eating and was having hospital investigations for the physical symptoms it caused.