I started listening to Slayer - Raining Blood while shaving as a joke, now I‘ve conditioned my body to focus when this song plays

Sabotage - beastie boys

Lemon Jelly - Ramblin' Man (the whole album is good, but Ramblin' Man is very chill)

Mr. Scruff - Keep it Unreal (I especially enjoy Midnight Feast, Shanty Town, Jusjus and Fish.)

There isn't a single one.

But, I'd have to give the nod to either "fade to black", Metallica; or "closer to fine", the Indigo Girls

Fade to Black should be obvious. It's the lyrics, the feel of the song, etc.

Closer to fine isn't really about the actual lyrics, it's about the sentiment of them, of moving through life and reaching new places and becoming. You get closer to fine by whatever path you're on. So, when shit is real, it's nice to have the reminder.

Sky Chase Zone - Sonic the Hedgehog 2

Follow the Sun - Xavier Rudd

Hammer Smashed Face by Cannibal Corpse. Something about the soft tones and slow rhythm just put my mind in a very gentle state.

The Middle by Jimmy Eat World

Animal Bar by Red Hot Chili Peppers

https://youtu.be/HwtljkGZJnI?si=p9-B0EPeeiFBwerh

Devin Townsend - Deep peace

Pikmin music can be so relaxing

Currently Sleep Token - Euclid, if not the entire Take Me Back To Eden album

Faith’s Hymn by Beautiful Chorus. It’s a capella, very gentle and harmonious humming and singing. Spotify

No drum and bass in the Jazz room

Or

Gregory and the Hawk - For the Best

Salt Tank - Dreams

Not necessarily a song but Fred Rogers's voice is pretty damn soothing