Take a multivitamin every day. You don’t have to go crazy with it, but even if you already eat healthy it can help fill in some of the gaps.
Or maybe it’s just placebo? But I feel better taking it vs not.
Exercise. Exactly how is not important. What matters is just being consistent. Eventually it becomes a habit that will grow with you.
If it’s difficult or frustrating, you’re probably trying too hard. Ease up next time. If it feels like a chore, you’re not doing the right activity for you. It should be enjoyable.
Not giving a shit about a lot of stuff. Opinions and so on. Drop what pulls you down.
(Yes there might be exceptions)
Running long distances. I fucking hate it but it makes me feel good.
Take care of your shoes and make sure your form is efficient, as in your feet aren’t slapping the ground. I used to run as far as ten miles a day, now my knees are smoked and can barely handle sprinting to the end of the block with my dog.