I have a carefully-curated Spotify playlist -- "FLOWSTATE: Repeatable FTW"[1] -- that I specifically optimized for "flowstate" (/Cal Newport "deep work" sessions). The tracks span various moods or vibes, but all are strictly instrumental, w/ limited dynamic range or significant musical variation, and a steady, energizing beat -- ie they're each deliberately repetitive and work well set on repeat. Airpods in, pick a track that resonates w my mood, set it on repeat, set my Pomodoro timer (to remind me to stand and move instead of hyperfocus for hours straight), and I can reliably enter flowstate almost right away.

1. Here's the playlist if anyone's interested:

https://open.spotify.com/playlist/6UScdOAlqXqWTOmXFgQhFA?si=...