Repeating mantras is awesome. I like to use these:
> "Dear God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference."
Basically Stoicism in a nutshell. I like this one and I like to practice it but I don't repeat, chant this one often in my mind now that I think about it ... the next 2 I repeat daily, nay, hourly, nay, even more probably.
> "There is never enough time to do everything, but there's always enough time to do the most important thing."
It's easy to get overwhelmed by the sheer complexity of the whole world (trust me, I've been there) but there is no escaping this. In the long run we're all dead anyway. There is basically always an infinite amount of things we can do but often there is only ONE thing that adds the most value or is the most important thing RIGHT now.
> "Look at how far youve come already."
For some reason this one motivates me because of all the hardships I've experienced already. I'm alive. I'm breating. I'm here. I'm going where I want to go. I have overcome all adversities in the past why should I not overcome this one? Let's go!
The first one is basically
Besides this, earplugs are SO nice. Just not hearing so much noise really really calms me down.